Home / 31,427.30-47,139.60-10,650.80

Finding the Fourth Proportional to 31,427.30, 47,139.60 and 10,650.80

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Solution

The fourth proportional to 31,427.30, 47,139.60 and 10,650.80 is: 15,975.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,427.30 : 47,139.60 = 10,650.80 : x
  2. Step 2: Convert to fraction form
    31,427.30/47,139.60 = 10,650.80/x
  3. Step 3: Cross multiply
    31,427.30x = 47,139.60 × 10,650.80
  4. Step 4: Simplify right side
    31,427.30x = 502,074,451.68
  5. Step 5: Solve for x
    x = 502,074,451.68/31,427.30
  6. Step 6: Final answer
    x = 15,975.74

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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.