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Finding the Fourth Proportional to 6,159.20, 8,321.40 and 6,159.20

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Solution

The fourth proportional to 6,159.20, 8,321.40 and 6,159.20 is: 8,321.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,159.20 : 8,321.40 = 6,159.20 : x
  2. Step 2: Convert to fraction form
    6,159.20/8,321.40 = 6,159.20/x
  3. Step 3: Cross multiply
    6,159.20x = 8,321.40 × 6,159.20
  4. Step 4: Simplify right side
    6,159.20x = 51,253,166.88
  5. Step 5: Solve for x
    x = 51,253,166.88/6,159.20
  6. Step 6: Final answer
    x = 8,321.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.