Home / 12,122.21-16,728.75-6,816.98

Finding the Fourth Proportional to 12,122.21, 16,728.75 and 6,816.98

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Solution

The fourth proportional to 12,122.21, 16,728.75 and 6,816.98 is: 9,407.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,122.21 : 16,728.75 = 6,816.98 : x
  2. Step 2: Convert to fraction form
    12,122.21/16,728.75 = 6,816.98/x
  3. Step 3: Cross multiply
    12,122.21x = 16,728.75 × 6,816.98
  4. Step 4: Simplify right side
    12,122.21x = 114,039,554.18
  5. Step 5: Solve for x
    x = 114,039,554.18/12,122.21
  6. Step 6: Final answer
    x = 9,407.49

Related Problems

Find fourth proportional to 6,061.11, 8,364.38 and 3,408.49
Half scale
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Double scale
Find fourth proportional to 12,123.21, 16,730.13 and 6,817.98
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.