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Finding the Fourth Proportional to 25,360.80, 38,038.80 and 8,719.20

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Solution

The fourth proportional to 25,360.80, 38,038.80 and 8,719.20 is: 13,077.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,360.80 : 38,038.80 = 8,719.20 : x
  2. Step 2: Convert to fraction form
    25,360.80/38,038.80 = 8,719.20/x
  3. Step 3: Cross multiply
    25,360.80x = 38,038.80 × 8,719.20
  4. Step 4: Simplify right side
    25,360.80x = 331,667,904.96
  5. Step 5: Solve for x
    x = 331,667,904.96/25,360.80
  6. Step 6: Final answer
    x = 13,077.97

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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.