Home / 31,700.76-47,551.68-11,988.60

Finding the Fourth Proportional to 31,700.76, 47,551.68 and 11,988.60

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Solution

The fourth proportional to 31,700.76, 47,551.68 and 11,988.60 is: 17,983.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,700.76 : 47,551.68 = 11,988.60 : x
  2. Step 2: Convert to fraction form
    31,700.76/47,551.68 = 11,988.60/x
  3. Step 3: Cross multiply
    31,700.76x = 47,551.68 × 11,988.60
  4. Step 4: Simplify right side
    31,700.76x = 570,078,070.85
  5. Step 5: Solve for x
    x = 570,078,070.85/31,700.76
  6. Step 6: Final answer
    x = 17,983.10

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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.