Home / 31,490.34-47,207.25-28,751.12

Finding the Fourth Proportional to 31,490.34, 47,207.25 and 28,751.12

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Solution

The fourth proportional to 31,490.34, 47,207.25 and 28,751.12 is: 43,100.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,490.34 : 47,207.25 = 28,751.12 : x
  2. Step 2: Convert to fraction form
    31,490.34/47,207.25 = 28,751.12/x
  3. Step 3: Cross multiply
    31,490.34x = 47,207.25 × 28,751.12
  4. Step 4: Simplify right side
    31,490.34x = 1,357,261,073.58
  5. Step 5: Solve for x
    x = 1,357,261,073.58/31,490.34
  6. Step 6: Final answer
    x = 43,100.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.