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Finding the Fourth Proportional to 31,372.80, 43,306.80 and 18,795.12

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Solution

The fourth proportional to 31,372.80, 43,306.80 and 18,795.12 is: 25,944.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,372.80 : 43,306.80 = 18,795.12 : x
  2. Step 2: Convert to fraction form
    31,372.80/43,306.80 = 18,795.12/x
  3. Step 3: Cross multiply
    31,372.80x = 43,306.80 × 18,795.12
  4. Step 4: Simplify right side
    31,372.80x = 813,956,502.82
  5. Step 5: Solve for x
    x = 813,956,502.82/31,372.80
  6. Step 6: Final answer
    x = 25,944.66

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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.