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Finding the Fourth Proportional to 25,789.52, 38,689.76 and 8,019.72

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Solution

The fourth proportional to 25,789.52, 38,689.76 and 8,019.72 is: 12,031.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,789.52 : 38,689.76 = 8,019.72 : x
  2. Step 2: Convert to fraction form
    25,789.52/38,689.76 = 8,019.72/x
  3. Step 3: Cross multiply
    25,789.52x = 38,689.76 × 8,019.72
  4. Step 4: Simplify right side
    25,789.52x = 310,281,042.07
  5. Step 5: Solve for x
    x = 310,281,042.07/25,789.52
  6. Step 6: Final answer
    x = 12,031.28

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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.