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Finding the Fourth Proportional to 31,773, 47,655.48 and 8,401.28

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Solution

The fourth proportional to 31,773, 47,655.48 and 8,401.28 is: 12,600.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,773 : 47,655.48 = 8,401.28 : x
  2. Step 2: Convert to fraction form
    31,773/47,655.48 = 8,401.28/x
  3. Step 3: Cross multiply
    31,773x = 47,655.48 × 8,401.28
  4. Step 4: Simplify right side
    31,773x = 400,367,031.01
  5. Step 5: Solve for x
    x = 400,367,031.01/31,773
  6. Step 6: Final answer
    x = 12,600.86

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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.