Home / 12,122.81-18,157.48-9,328.91

Finding the Fourth Proportional to 12,122.81, 18,157.48 and 9,328.91

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Solution

The fourth proportional to 12,122.81, 18,157.48 and 9,328.91 is: 13,972.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,122.81 : 18,157.48 = 9,328.91 : x
  2. Step 2: Convert to fraction form
    12,122.81/18,157.48 = 9,328.91/x
  3. Step 3: Cross multiply
    12,122.81x = 18,157.48 × 9,328.91
  4. Step 4: Simplify right side
    12,122.81x = 169,389,518.82
  5. Step 5: Solve for x
    x = 169,389,518.82/12,122.81
  6. Step 6: Final answer
    x = 13,972.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.