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Finding the Fourth Proportional to 31,581.30, 47,363.70 and 9,388.70

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Solution

The fourth proportional to 31,581.30, 47,363.70 and 9,388.70 is: 14,080.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,581.30 : 47,363.70 = 9,388.70 : x
  2. Step 2: Convert to fraction form
    31,581.30/47,363.70 = 9,388.70/x
  3. Step 3: Cross multiply
    31,581.30x = 47,363.70 × 9,388.70
  4. Step 4: Simplify right side
    31,581.30x = 444,683,570.19
  5. Step 5: Solve for x
    x = 444,683,570.19/31,581.30
  6. Step 6: Final answer
    x = 14,080.60

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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.