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Finding the Fourth Proportional to 8,753.70, 13,136.70 and 7,917.16

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Solution

The fourth proportional to 8,753.70, 13,136.70 and 7,917.16 is: 11,881.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,753.70 : 13,136.70 = 7,917.16 : x
  2. Step 2: Convert to fraction form
    8,753.70/13,136.70 = 7,917.16/x
  3. Step 3: Cross multiply
    8,753.70x = 13,136.70 × 7,917.16
  4. Step 4: Simplify right side
    8,753.70x = 104,005,355.77
  5. Step 5: Solve for x
    x = 104,005,355.77/8,753.70
  6. Step 6: Final answer
    x = 11,881.30

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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.