Home / 25,990.12-38,979.21-7,271.48

Finding the Fourth Proportional to 25,990.12, 38,979.21 and 7,271.48

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Solution

The fourth proportional to 25,990.12, 38,979.21 and 7,271.48 is: 10,905.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,990.12 : 38,979.21 = 7,271.48 : x
  2. Step 2: Convert to fraction form
    25,990.12/38,979.21 = 7,271.48/x
  3. Step 3: Cross multiply
    25,990.12x = 38,979.21 × 7,271.48
  4. Step 4: Simplify right side
    25,990.12x = 283,436,591.90
  5. Step 5: Solve for x
    x = 283,436,591.90/25,990.12
  6. Step 6: Final answer
    x = 10,905.55

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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.