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Finding the Fourth Proportional to 25,689.25, 38,533.88 and 7,221.25

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Solution

The fourth proportional to 25,689.25, 38,533.88 and 7,221.25 is: 10,831.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,689.25 : 38,533.88 = 7,221.25 : x
  2. Step 2: Convert to fraction form
    25,689.25/38,533.88 = 7,221.25/x
  3. Step 3: Cross multiply
    25,689.25x = 38,533.88 × 7,221.25
  4. Step 4: Simplify right side
    25,689.25x = 278,262,780.95
  5. Step 5: Solve for x
    x = 278,262,780.95/25,689.25
  6. Step 6: Final answer
    x = 10,831.88

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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.