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Finding the Fourth Proportional to 6,276.70, 8,640.10 and 5,425.56

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Solution

The fourth proportional to 6,276.70, 8,640.10 and 5,425.56 is: 7,468.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,276.70 : 8,640.10 = 5,425.56 : x
  2. Step 2: Convert to fraction form
    6,276.70/8,640.10 = 5,425.56/x
  3. Step 3: Cross multiply
    6,276.70x = 8,640.10 × 5,425.56
  4. Step 4: Simplify right side
    6,276.70x = 46,877,387.74
  5. Step 5: Solve for x
    x = 46,877,387.74/6,276.70
  6. Step 6: Final answer
    x = 7,468.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.