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Finding the Fourth Proportional to 37,999.80, 56,934.90 and 31,390.20

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Solution

The fourth proportional to 37,999.80, 56,934.90 and 31,390.20 is: 47,031.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,999.80 : 56,934.90 = 31,390.20 : x
  2. Step 2: Convert to fraction form
    37,999.80/56,934.90 = 31,390.20/x
  3. Step 3: Cross multiply
    37,999.80x = 56,934.90 × 31,390.20
  4. Step 4: Simplify right side
    37,999.80x = 1,787,197,897.98
  5. Step 5: Solve for x
    x = 1,787,197,897.98/37,999.80
  6. Step 6: Final answer
    x = 47,031.77

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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.