Home / 20,535.88-28,335-15,761.20

Finding the Fourth Proportional to 20,535.88, 28,335 and 15,761.20

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Solution

The fourth proportional to 20,535.88, 28,335 and 15,761.20 is: 21,746.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,535.88 : 28,335 = 15,761.20 : x
  2. Step 2: Convert to fraction form
    20,535.88/28,335 = 15,761.20/x
  3. Step 3: Cross multiply
    20,535.88x = 28,335 × 15,761.20
  4. Step 4: Simplify right side
    20,535.88x = 446,593,602
  5. Step 5: Solve for x
    x = 446,593,602/20,535.88
  6. Step 6: Final answer
    x = 21,746.99

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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.