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Finding the Fourth Proportional to 8,663.60, 11,953.68 and 5,127.68

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Solution

The fourth proportional to 8,663.60, 11,953.68 and 5,127.68 is: 7,074.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,663.60 : 11,953.68 = 5,127.68 : x
  2. Step 2: Convert to fraction form
    8,663.60/11,953.68 = 5,127.68/x
  3. Step 3: Cross multiply
    8,663.60x = 11,953.68 × 5,127.68
  4. Step 4: Simplify right side
    8,663.60x = 61,294,645.86
  5. Step 5: Solve for x
    x = 61,294,645.86/8,663.60
  6. Step 6: Final answer
    x = 7,074.96

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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.