Home / 31,987.13-47,980.69-8,613.56

Finding the Fourth Proportional to 31,987.13, 47,980.69 and 8,613.56

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Solution

The fourth proportional to 31,987.13, 47,980.69 and 8,613.56 is: 12,920.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,987.13 : 47,980.69 = 8,613.56 : x
  2. Step 2: Convert to fraction form
    31,987.13/47,980.69 = 8,613.56/x
  3. Step 3: Cross multiply
    31,987.13x = 47,980.69 × 8,613.56
  4. Step 4: Simplify right side
    31,987.13x = 413,284,650.57
  5. Step 5: Solve for x
    x = 413,284,650.57/31,987.13
  6. Step 6: Final answer
    x = 12,920.34

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1.5x scale

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.