Home / 31,931.40-47,897.10-8,238.90

Finding the Fourth Proportional to 31,931.40, 47,897.10 and 8,238.90

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Solution

The fourth proportional to 31,931.40, 47,897.10 and 8,238.90 is: 12,358.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,931.40 : 47,897.10 = 8,238.90 : x
  2. Step 2: Convert to fraction form
    31,931.40/47,897.10 = 8,238.90/x
  3. Step 3: Cross multiply
    31,931.40x = 47,897.10 × 8,238.90
  4. Step 4: Simplify right side
    31,931.40x = 394,619,417.19
  5. Step 5: Solve for x
    x = 394,619,417.19/31,931.40
  6. Step 6: Final answer
    x = 12,358.35

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Similar ratio
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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.