Home / 25,719.20-38,582.40-8,187.20

Finding the Fourth Proportional to 25,719.20, 38,582.40 and 8,187.20

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Solution

The fourth proportional to 25,719.20, 38,582.40 and 8,187.20 is: 12,281.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,719.20 : 38,582.40 = 8,187.20 : x
  2. Step 2: Convert to fraction form
    25,719.20/38,582.40 = 8,187.20/x
  3. Step 3: Cross multiply
    25,719.20x = 38,582.40 × 8,187.20
  4. Step 4: Simplify right side
    25,719.20x = 315,881,825.28
  5. Step 5: Solve for x
    x = 315,881,825.28/25,719.20
  6. Step 6: Final answer
    x = 12,281.95

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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.