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Finding the Fourth Proportional to 8,809.68, 12,155.58 and 5,979.30

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Solution

The fourth proportional to 8,809.68, 12,155.58 and 5,979.30 is: 8,250.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,809.68 : 12,155.58 = 5,979.30 : x
  2. Step 2: Convert to fraction form
    8,809.68/12,155.58 = 5,979.30/x
  3. Step 3: Cross multiply
    8,809.68x = 12,155.58 × 5,979.30
  4. Step 4: Simplify right side
    8,809.68x = 72,681,859.49
  5. Step 5: Solve for x
    x = 72,681,859.49/8,809.68
  6. Step 6: Final answer
    x = 8,250.23

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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.