Home / 31,827.20-47,757-13,121.60

Finding the Fourth Proportional to 31,827.20, 47,757 and 13,121.60

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Solution

The fourth proportional to 31,827.20, 47,757 and 13,121.60 is: 19,689.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,827.20 : 47,757 = 13,121.60 : x
  2. Step 2: Convert to fraction form
    31,827.20/47,757 = 13,121.60/x
  3. Step 3: Cross multiply
    31,827.20x = 47,757 × 13,121.60
  4. Step 4: Simplify right side
    31,827.20x = 626,648,251.20
  5. Step 5: Solve for x
    x = 626,648,251.20/31,827.20
  6. Step 6: Final answer
    x = 19,689.08

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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.