Home / 31,126.62-42,920.68-21,037.58

Finding the Fourth Proportional to 31,126.62, 42,920.68 and 21,037.58

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Solution

The fourth proportional to 31,126.62, 42,920.68 and 21,037.58 is: 29,008.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,126.62 : 42,920.68 = 21,037.58 : x
  2. Step 2: Convert to fraction form
    31,126.62/42,920.68 = 21,037.58/x
  3. Step 3: Cross multiply
    31,126.62x = 42,920.68 × 21,037.58
  4. Step 4: Simplify right side
    31,126.62x = 902,947,239.15
  5. Step 5: Solve for x
    x = 902,947,239.15/31,126.62
  6. Step 6: Final answer
    x = 29,008.84

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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.