Home / 38,511.40-53,145.13-21,515.88

Finding the Fourth Proportional to 38,511.40, 53,145.13 and 21,515.88

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Solution

The fourth proportional to 38,511.40, 53,145.13 and 21,515.88 is: 29,691.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,511.40 : 53,145.13 = 21,515.88 : x
  2. Step 2: Convert to fraction form
    38,511.40/53,145.13 = 21,515.88/x
  3. Step 3: Cross multiply
    38,511.40x = 53,145.13 × 21,515.88
  4. Step 4: Simplify right side
    38,511.40x = 1,143,464,126.57
  5. Step 5: Solve for x
    x = 1,143,464,126.57/38,511.40
  6. Step 6: Final answer
    x = 29,691.58

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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.