Home / 5,425.48-8,139.78-1,728.28

Finding the Fourth Proportional to 5,425.48, 8,139.78 and 1,728.28

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Solution

The fourth proportional to 5,425.48, 8,139.78 and 1,728.28 is: 2,592.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,425.48 : 8,139.78 = 1,728.28 : x
  2. Step 2: Convert to fraction form
    5,425.48/8,139.78 = 1,728.28/x
  3. Step 3: Cross multiply
    5,425.48x = 8,139.78 × 1,728.28
  4. Step 4: Simplify right side
    5,425.48x = 14,067,818.98
  5. Step 5: Solve for x
    x = 14,067,818.98/5,425.48
  6. Step 6: Final answer
    x = 2,592.92

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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.