Home / 21,639.56-29,854.59-15,987.92

Finding the Fourth Proportional to 21,639.56, 29,854.59 and 15,987.92

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Solution

The fourth proportional to 21,639.56, 29,854.59 and 15,987.92 is: 22,057.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.56 : 29,854.59 = 15,987.92 : x
  2. Step 2: Convert to fraction form
    21,639.56/29,854.59 = 15,987.92/x
  3. Step 3: Cross multiply
    21,639.56x = 29,854.59 × 15,987.92
  4. Step 4: Simplify right side
    21,639.56x = 477,312,796.55
  5. Step 5: Solve for x
    x = 477,312,796.55/21,639.56
  6. Step 6: Final answer
    x = 22,057.42

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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.