Home / 31,451.78-47,184.60-13,685.22

Finding the Fourth Proportional to 31,451.78, 47,184.60 and 13,685.22

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Solution

The fourth proportional to 31,451.78, 47,184.60 and 13,685.22 is: 20,530.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,451.78 : 47,184.60 = 13,685.22 : x
  2. Step 2: Convert to fraction form
    31,451.78/47,184.60 = 13,685.22/x
  3. Step 3: Cross multiply
    31,451.78x = 47,184.60 × 13,685.22
  4. Step 4: Simplify right side
    31,451.78x = 645,731,631.61
  5. Step 5: Solve for x
    x = 645,731,631.61/31,451.78
  6. Step 6: Final answer
    x = 20,530.85

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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.