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Finding the Fourth Proportional to 11,781.60, 17,715.60 and 9,880.80

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Solution

The fourth proportional to 11,781.60, 17,715.60 and 9,880.80 is: 14,857.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,781.60 : 17,715.60 = 9,880.80 : x
  2. Step 2: Convert to fraction form
    11,781.60/17,715.60 = 9,880.80/x
  3. Step 3: Cross multiply
    11,781.60x = 17,715.60 × 9,880.80
  4. Step 4: Simplify right side
    11,781.60x = 175,044,300.48
  5. Step 5: Solve for x
    x = 175,044,300.48/11,781.60
  6. Step 6: Final answer
    x = 14,857.43

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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.