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Finding the Fourth Proportional to 9,178.79, 12,666.72 and 4,987.04

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Solution

The fourth proportional to 9,178.79, 12,666.72 and 4,987.04 is: 6,882.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,178.79 : 12,666.72 = 4,987.04 : x
  2. Step 2: Convert to fraction form
    9,178.79/12,666.72 = 4,987.04/x
  3. Step 3: Cross multiply
    9,178.79x = 12,666.72 × 4,987.04
  4. Step 4: Simplify right side
    9,178.79x = 63,169,375.98
  5. Step 5: Solve for x
    x = 63,169,375.98/9,178.79
  6. Step 6: Final answer
    x = 6,882.11

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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.