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Finding the Fourth Proportional to 21,555.01, 29,737.63 and 15,903.14

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Solution

The fourth proportional to 21,555.01, 29,737.63 and 15,903.14 is: 21,940.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.01 : 29,737.63 = 15,903.14 : x
  2. Step 2: Convert to fraction form
    21,555.01/29,737.63 = 15,903.14/x
  3. Step 3: Cross multiply
    21,555.01x = 29,737.63 × 15,903.14
  4. Step 4: Simplify right side
    21,555.01x = 472,921,564.35
  5. Step 5: Solve for x
    x = 472,921,564.35/21,555.01
  6. Step 6: Final answer
    x = 21,940.21

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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.