Home / 31,985.64-47,981.16-8,613.36

Finding the Fourth Proportional to 31,985.64, 47,981.16 and 8,613.36

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Solution

The fourth proportional to 31,985.64, 47,981.16 and 8,613.36 is: 12,920.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,985.64 : 47,981.16 = 8,613.36 : x
  2. Step 2: Convert to fraction form
    31,985.64/47,981.16 = 8,613.36/x
  3. Step 3: Cross multiply
    31,985.64x = 47,981.16 × 8,613.36
  4. Step 4: Simplify right side
    31,985.64x = 413,279,004.30
  5. Step 5: Solve for x
    x = 413,279,004.30/31,985.64
  6. Step 6: Final answer
    x = 12,920.77

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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.