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Finding the Fourth Proportional to 31,775.13, 47,662.70 and 8,401.57

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Solution

The fourth proportional to 31,775.13, 47,662.70 and 8,401.57 is: 12,602.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,775.13 : 47,662.70 = 8,401.57 : x
  2. Step 2: Convert to fraction form
    31,775.13/47,662.70 = 8,401.57/x
  3. Step 3: Cross multiply
    31,775.13x = 47,662.70 × 8,401.57
  4. Step 4: Simplify right side
    31,775.13x = 400,441,510.44
  5. Step 5: Solve for x
    x = 400,441,510.44/31,775.13
  6. Step 6: Final answer
    x = 12,602.36

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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.