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Finding the Fourth Proportional to 5,326.47, 7,990.95 and 2,687.49

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Solution

The fourth proportional to 5,326.47, 7,990.95 and 2,687.49 is: 4,031.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,326.47 : 7,990.95 = 2,687.49 : x
  2. Step 2: Convert to fraction form
    5,326.47/7,990.95 = 2,687.49/x
  3. Step 3: Cross multiply
    5,326.47x = 7,990.95 × 2,687.49
  4. Step 4: Simplify right side
    5,326.47x = 21,475,598.22
  5. Step 5: Solve for x
    x = 21,475,598.22/5,326.47
  6. Step 6: Final answer
    x = 4,031.86

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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.