Home / 31,543.20-47,316.96-8,172

Finding the Fourth Proportional to 31,543.20, 47,316.96 and 8,172

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Solution

The fourth proportional to 31,543.20, 47,316.96 and 8,172 is: 12,258.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,543.20 : 47,316.96 = 8,172 : x
  2. Step 2: Convert to fraction form
    31,543.20/47,316.96 = 8,172/x
  3. Step 3: Cross multiply
    31,543.20x = 47,316.96 × 8,172
  4. Step 4: Simplify right side
    31,543.20x = 386,674,197.12
  5. Step 5: Solve for x
    x = 386,674,197.12/31,543.20
  6. Step 6: Final answer
    x = 12,258.56

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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.