Home / 12,255.19-16,909.20-7,219.01

Finding the Fourth Proportional to 12,255.19, 16,909.20 and 7,219.01

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Solution

The fourth proportional to 12,255.19, 16,909.20 and 7,219.01 is: 9,960.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,255.19 : 16,909.20 = 7,219.01 : x
  2. Step 2: Convert to fraction form
    12,255.19/16,909.20 = 7,219.01/x
  3. Step 3: Cross multiply
    12,255.19x = 16,909.20 × 7,219.01
  4. Step 4: Simplify right side
    12,255.19x = 122,067,683.89
  5. Step 5: Solve for x
    x = 122,067,683.89/12,255.19
  6. Step 6: Final answer
    x = 9,960.49

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Half scale
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Double scale
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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.