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Finding the Fourth Proportional to 6,657.20, 9,966.60 and 4,065.20

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Solution

The fourth proportional to 6,657.20, 9,966.60 and 4,065.20 is: 6,086.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,657.20 : 9,966.60 = 4,065.20 : x
  2. Step 2: Convert to fraction form
    6,657.20/9,966.60 = 4,065.20/x
  3. Step 3: Cross multiply
    6,657.20x = 9,966.60 × 4,065.20
  4. Step 4: Simplify right side
    6,657.20x = 40,516,222.32
  5. Step 5: Solve for x
    x = 40,516,222.32/6,657.20
  6. Step 6: Final answer
    x = 6,086.08

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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.