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Finding the Fourth Proportional to 8,781.17, 13,152.99 and 7,108.07

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Solution

The fourth proportional to 8,781.17, 13,152.99 and 7,108.07 is: 10,646.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.17 : 13,152.99 = 7,108.07 : x
  2. Step 2: Convert to fraction form
    8,781.17/13,152.99 = 7,108.07/x
  3. Step 3: Cross multiply
    8,781.17x = 13,152.99 × 7,108.07
  4. Step 4: Simplify right side
    8,781.17x = 93,492,373.63
  5. Step 5: Solve for x
    x = 93,492,373.63/8,781.17
  6. Step 6: Final answer
    x = 10,646.92

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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.