Home / 21,171.92-29,217-11,612.30

Finding the Fourth Proportional to 21,171.92, 29,217 and 11,612.30

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Solution

The fourth proportional to 21,171.92, 29,217 and 11,612.30 is: 16,024.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.92 : 29,217 = 11,612.30 : x
  2. Step 2: Convert to fraction form
    21,171.92/29,217 = 11,612.30/x
  3. Step 3: Cross multiply
    21,171.92x = 29,217 × 11,612.30
  4. Step 4: Simplify right side
    21,171.92x = 339,276,569.10
  5. Step 5: Solve for x
    x = 339,276,569.10/21,171.92
  6. Step 6: Final answer
    x = 16,024.84

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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.