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Finding the Fourth Proportional to 7,129.60, 10,694.40 and 6,546.40

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Solution

The fourth proportional to 7,129.60, 10,694.40 and 6,546.40 is: 9,819.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.60 : 10,694.40 = 6,546.40 : x
  2. Step 2: Convert to fraction form
    7,129.60/10,694.40 = 6,546.40/x
  3. Step 3: Cross multiply
    7,129.60x = 10,694.40 × 6,546.40
  4. Step 4: Simplify right side
    7,129.60x = 70,009,820.16
  5. Step 5: Solve for x
    x = 70,009,820.16/7,129.60
  6. Step 6: Final answer
    x = 9,819.60

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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.