Home / 31,509.11-47,283.38-12,789.15

Finding the Fourth Proportional to 31,509.11, 47,283.38 and 12,789.15

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Solution

The fourth proportional to 31,509.11, 47,283.38 and 12,789.15 is: 19,191.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,509.11 : 47,283.38 = 12,789.15 : x
  2. Step 2: Convert to fraction form
    31,509.11/47,283.38 = 12,789.15/x
  3. Step 3: Cross multiply
    31,509.11x = 47,283.38 × 12,789.15
  4. Step 4: Simplify right side
    31,509.11x = 604,714,175.38
  5. Step 5: Solve for x
    x = 604,714,175.38/31,509.11
  6. Step 6: Final answer
    x = 19,191.73

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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.