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Finding the Fourth Proportional to 8,459.40, 12,713.40 and 7,390.20

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Solution

The fourth proportional to 8,459.40, 12,713.40 and 7,390.20 is: 11,106.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,459.40 : 12,713.40 = 7,390.20 : x
  2. Step 2: Convert to fraction form
    8,459.40/12,713.40 = 7,390.20/x
  3. Step 3: Cross multiply
    8,459.40x = 12,713.40 × 7,390.20
  4. Step 4: Simplify right side
    8,459.40x = 93,954,568.68
  5. Step 5: Solve for x
    x = 93,954,568.68/8,459.40
  6. Step 6: Final answer
    x = 11,106.53

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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.