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Finding the Fourth Proportional to 8,697.12, 13,045.36 and 8,143.60

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Solution

The fourth proportional to 8,697.12, 13,045.36 and 8,143.60 is: 12,215.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,697.12 : 13,045.36 = 8,143.60 : x
  2. Step 2: Convert to fraction form
    8,697.12/13,045.36 = 8,143.60/x
  3. Step 3: Cross multiply
    8,697.12x = 13,045.36 × 8,143.60
  4. Step 4: Simplify right side
    8,697.12x = 106,236,193.70
  5. Step 5: Solve for x
    x = 106,236,193.70/8,697.12
  6. Step 6: Final answer
    x = 12,215.10

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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.