Home / 25,991.03-38,990.63-8,456.76

Finding the Fourth Proportional to 25,991.03, 38,990.63 and 8,456.76

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Solution

The fourth proportional to 25,991.03, 38,990.63 and 8,456.76 is: 12,686.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,991.03 : 38,990.63 = 8,456.76 : x
  2. Step 2: Convert to fraction form
    25,991.03/38,990.63 = 8,456.76/x
  3. Step 3: Cross multiply
    25,991.03x = 38,990.63 × 8,456.76
  4. Step 4: Simplify right side
    25,991.03x = 329,734,357.88
  5. Step 5: Solve for x
    x = 329,734,357.88/25,991.03
  6. Step 6: Final answer
    x = 12,686.47

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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.