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Finding the Fourth Proportional to 8,740.20, 12,037.50 and 8,578.20

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Solution

The fourth proportional to 8,740.20, 12,037.50 and 8,578.20 is: 11,814.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,740.20 : 12,037.50 = 8,578.20 : x
  2. Step 2: Convert to fraction form
    8,740.20/12,037.50 = 8,578.20/x
  3. Step 3: Cross multiply
    8,740.20x = 12,037.50 × 8,578.20
  4. Step 4: Simplify right side
    8,740.20x = 103,260,082.50
  5. Step 5: Solve for x
    x = 103,260,082.50/8,740.20
  6. Step 6: Final answer
    x = 11,814.38

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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.