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Finding the Fourth Proportional to 6,612.96, 9,914.40 and 5,155.20

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Solution

The fourth proportional to 6,612.96, 9,914.40 and 5,155.20 is: 7,728.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,612.96 : 9,914.40 = 5,155.20 : x
  2. Step 2: Convert to fraction form
    6,612.96/9,914.40 = 5,155.20/x
  3. Step 3: Cross multiply
    6,612.96x = 9,914.40 × 5,155.20
  4. Step 4: Simplify right side
    6,612.96x = 51,110,714.88
  5. Step 5: Solve for x
    x = 51,110,714.88/6,612.96
  6. Step 6: Final answer
    x = 7,728.87

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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.