Home / 38,687.68-53,385.28-21,920.64

Finding the Fourth Proportional to 38,687.68, 53,385.28 and 21,920.64

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Solution

The fourth proportional to 38,687.68, 53,385.28 and 21,920.64 is: 30,248.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,687.68 : 53,385.28 = 21,920.64 : x
  2. Step 2: Convert to fraction form
    38,687.68/53,385.28 = 21,920.64/x
  3. Step 3: Cross multiply
    38,687.68x = 53,385.28 × 21,920.64
  4. Step 4: Simplify right side
    38,687.68x = 1,170,239,504.18
  5. Step 5: Solve for x
    x = 1,170,239,504.18/38,687.68
  6. Step 6: Final answer
    x = 30,248.38

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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.