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Finding the Fourth Proportional to 8,979.04, 12,398.76 and 8,578.18

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Solution

The fourth proportional to 8,979.04, 12,398.76 and 8,578.18 is: 11,845.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.04 : 12,398.76 = 8,578.18 : x
  2. Step 2: Convert to fraction form
    8,979.04/12,398.76 = 8,578.18/x
  3. Step 3: Cross multiply
    8,979.04x = 12,398.76 × 8,578.18
  4. Step 4: Simplify right side
    8,979.04x = 106,358,795.06
  5. Step 5: Solve for x
    x = 106,358,795.06/8,979.04
  6. Step 6: Final answer
    x = 11,845.23

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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.