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Finding the Fourth Proportional to 8,875.68, 12,254.60 and 5,520

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Solution

The fourth proportional to 8,875.68, 12,254.60 and 5,520 is: 7,621.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,875.68 : 12,254.60 = 5,520 : x
  2. Step 2: Convert to fraction form
    8,875.68/12,254.60 = 5,520/x
  3. Step 3: Cross multiply
    8,875.68x = 12,254.60 × 5,520
  4. Step 4: Simplify right side
    8,875.68x = 67,645,392
  5. Step 5: Solve for x
    x = 67,645,392/8,875.68
  6. Step 6: Final answer
    x = 7,621.43

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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.