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Finding the Fourth Proportional to 8,437.40, 12,680.40 and 7,368.20

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Solution

The fourth proportional to 8,437.40, 12,680.40 and 7,368.20 is: 11,073.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,437.40 : 12,680.40 = 7,368.20 : x
  2. Step 2: Convert to fraction form
    8,437.40/12,680.40 = 7,368.20/x
  3. Step 3: Cross multiply
    8,437.40x = 12,680.40 × 7,368.20
  4. Step 4: Simplify right side
    8,437.40x = 93,431,723.28
  5. Step 5: Solve for x
    x = 93,431,723.28/8,437.40
  6. Step 6: Final answer
    x = 11,073.52

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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.