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Finding the Fourth Proportional to 8,967.62, 12,372.26 and 5,189.78

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Solution

The fourth proportional to 8,967.62, 12,372.26 and 5,189.78 is: 7,160.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,967.62 : 12,372.26 = 5,189.78 : x
  2. Step 2: Convert to fraction form
    8,967.62/12,372.26 = 5,189.78/x
  3. Step 3: Cross multiply
    8,967.62x = 12,372.26 × 5,189.78
  4. Step 4: Simplify right side
    8,967.62x = 64,209,307.50
  5. Step 5: Solve for x
    x = 64,209,307.50/8,967.62
  6. Step 6: Final answer
    x = 7,160.13

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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.