Home / 8,616.32-12,892.80-5,331.20

Finding the Fourth Proportional to 8,616.32, 12,892.80 and 5,331.20

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Solution

The fourth proportional to 8,616.32, 12,892.80 and 5,331.20 is: 7,977.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,616.32 : 12,892.80 = 5,331.20 : x
  2. Step 2: Convert to fraction form
    8,616.32/12,892.80 = 5,331.20/x
  3. Step 3: Cross multiply
    8,616.32x = 12,892.80 × 5,331.20
  4. Step 4: Simplify right side
    8,616.32x = 68,734,095.36
  5. Step 5: Solve for x
    x = 68,734,095.36/8,616.32
  6. Step 6: Final answer
    x = 7,977.20

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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.