Home / 21,659.72-29,892.15-17,220.11

Finding the Fourth Proportional to 21,659.72, 29,892.15 and 17,220.11

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Solution

The fourth proportional to 21,659.72, 29,892.15 and 17,220.11 is: 23,765.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,659.72 : 29,892.15 = 17,220.11 : x
  2. Step 2: Convert to fraction form
    21,659.72/29,892.15 = 17,220.11/x
  3. Step 3: Cross multiply
    21,659.72x = 29,892.15 × 17,220.11
  4. Step 4: Simplify right side
    21,659.72x = 514,746,111.14
  5. Step 5: Solve for x
    x = 514,746,111.14/21,659.72
  6. Step 6: Final answer
    x = 23,765.13

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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.