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Finding the Fourth Proportional to 7,008.40, 10,512.60 and 5,712.40

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Solution

The fourth proportional to 7,008.40, 10,512.60 and 5,712.40 is: 8,568.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,008.40 : 10,512.60 = 5,712.40 : x
  2. Step 2: Convert to fraction form
    7,008.40/10,512.60 = 5,712.40/x
  3. Step 3: Cross multiply
    7,008.40x = 10,512.60 × 5,712.40
  4. Step 4: Simplify right side
    7,008.40x = 60,052,176.24
  5. Step 5: Solve for x
    x = 60,052,176.24/7,008.40
  6. Step 6: Final answer
    x = 8,568.60

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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.