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Finding the Fourth Proportional to 8,781.01, 12,113.65 and 5,243.94

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Solution

The fourth proportional to 8,781.01, 12,113.65 and 5,243.94 is: 7,234.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.01 : 12,113.65 = 5,243.94 : x
  2. Step 2: Convert to fraction form
    8,781.01/12,113.65 = 5,243.94/x
  3. Step 3: Cross multiply
    8,781.01x = 12,113.65 × 5,243.94
  4. Step 4: Simplify right side
    8,781.01x = 63,523,260.34
  5. Step 5: Solve for x
    x = 63,523,260.34/8,781.01
  6. Step 6: Final answer
    x = 7,234.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.