Home / 21,685.08-29,929.86-12,737.28

Finding the Fourth Proportional to 21,685.08, 29,929.86 and 12,737.28

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Solution

The fourth proportional to 21,685.08, 29,929.86 and 12,737.28 is: 17,580.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,685.08 : 29,929.86 = 12,737.28 : x
  2. Step 2: Convert to fraction form
    21,685.08/29,929.86 = 12,737.28/x
  3. Step 3: Cross multiply
    21,685.08x = 29,929.86 × 12,737.28
  4. Step 4: Simplify right side
    21,685.08x = 381,225,007.18
  5. Step 5: Solve for x
    x = 381,225,007.18/21,685.08
  6. Step 6: Final answer
    x = 17,580.06

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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.