Home / 38,631.87-53,308.40-21,864.87

Finding the Fourth Proportional to 38,631.87, 53,308.40 and 21,864.87

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Solution

The fourth proportional to 38,631.87, 53,308.40 and 21,864.87 is: 30,171.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,631.87 : 53,308.40 = 21,864.87 : x
  2. Step 2: Convert to fraction form
    38,631.87/53,308.40 = 21,864.87/x
  3. Step 3: Cross multiply
    38,631.87x = 53,308.40 × 21,864.87
  4. Step 4: Simplify right side
    38,631.87x = 1,165,581,126.58
  5. Step 5: Solve for x
    x = 1,165,581,126.58/38,631.87
  6. Step 6: Final answer
    x = 30,171.49

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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.