Home / 31,690.90-43,731.45-18,597.70

Finding the Fourth Proportional to 31,690.90, 43,731.45 and 18,597.70

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Solution

The fourth proportional to 31,690.90, 43,731.45 and 18,597.70 is: 25,663.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,690.90 : 43,731.45 = 18,597.70 : x
  2. Step 2: Convert to fraction form
    31,690.90/43,731.45 = 18,597.70/x
  3. Step 3: Cross multiply
    31,690.90x = 43,731.45 × 18,597.70
  4. Step 4: Simplify right side
    31,690.90x = 813,304,387.67
  5. Step 5: Solve for x
    x = 813,304,387.67/31,690.90
  6. Step 6: Final answer
    x = 25,663.66

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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.