Home / 31,631.76-47,447.60-12,920.59

Finding the Fourth Proportional to 31,631.76, 47,447.60 and 12,920.59

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Solution

The fourth proportional to 31,631.76, 47,447.60 and 12,920.59 is: 19,380.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,631.76 : 47,447.60 = 12,920.59 : x
  2. Step 2: Convert to fraction form
    31,631.76/47,447.60 = 12,920.59/x
  3. Step 3: Cross multiply
    31,631.76x = 47,447.60 × 12,920.59
  4. Step 4: Simplify right side
    31,631.76x = 613,050,986.08
  5. Step 5: Solve for x
    x = 613,050,986.08/31,631.76
  6. Step 6: Final answer
    x = 19,380.87

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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.