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Finding the Fourth Proportional to 8,762.76, 12,087.36 and 5,613.48

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Solution

The fourth proportional to 8,762.76, 12,087.36 and 5,613.48 is: 7,743.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,762.76 : 12,087.36 = 5,613.48 : x
  2. Step 2: Convert to fraction form
    8,762.76/12,087.36 = 5,613.48/x
  3. Step 3: Cross multiply
    8,762.76x = 12,087.36 × 5,613.48
  4. Step 4: Simplify right side
    8,762.76x = 67,852,153.61
  5. Step 5: Solve for x
    x = 67,852,153.61/8,762.76
  6. Step 6: Final answer
    x = 7,743.24

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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.