Home / 31,160.11-42,956.29-19,215.43

Finding the Fourth Proportional to 31,160.11, 42,956.29 and 19,215.43

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Solution

The fourth proportional to 31,160.11, 42,956.29 and 19,215.43 is: 26,489.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,160.11 : 42,956.29 = 19,215.43 : x
  2. Step 2: Convert to fraction form
    31,160.11/42,956.29 = 19,215.43/x
  3. Step 3: Cross multiply
    31,160.11x = 42,956.29 × 19,215.43
  4. Step 4: Simplify right side
    31,160.11x = 825,423,583.55
  5. Step 5: Solve for x
    x = 825,423,583.55/31,160.11
  6. Step 6: Final answer
    x = 26,489.75

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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.