Home / 31,138.67-42,972.30-17,711.85

Finding the Fourth Proportional to 31,138.67, 42,972.30 and 17,711.85

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Solution

The fourth proportional to 31,138.67, 42,972.30 and 17,711.85 is: 24,442.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,138.67 : 42,972.30 = 17,711.85 : x
  2. Step 2: Convert to fraction form
    31,138.67/42,972.30 = 17,711.85/x
  3. Step 3: Cross multiply
    31,138.67x = 42,972.30 × 17,711.85
  4. Step 4: Simplify right side
    31,138.67x = 761,118,931.76
  5. Step 5: Solve for x
    x = 761,118,931.76/31,138.67
  6. Step 6: Final answer
    x = 24,442.89

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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.