Home / 31,875.68-47,821.08-20,198.72

Finding the Fourth Proportional to 31,875.68, 47,821.08 and 20,198.72

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Solution

The fourth proportional to 31,875.68, 47,821.08 and 20,198.72 is: 30,302.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,875.68 : 47,821.08 = 20,198.72 : x
  2. Step 2: Convert to fraction form
    31,875.68/47,821.08 = 20,198.72/x
  3. Step 3: Cross multiply
    31,875.68x = 47,821.08 × 20,198.72
  4. Step 4: Simplify right side
    31,875.68x = 965,924,605.02
  5. Step 5: Solve for x
    x = 965,924,605.02/31,875.68
  6. Step 6: Final answer
    x = 30,302.87

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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.