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Finding the Fourth Proportional to 25,486.40, 38,171.39 and 12,168.76

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Solution

The fourth proportional to 25,486.40, 38,171.39 and 12,168.76 is: 18,225.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,486.40 : 38,171.39 = 12,168.76 : x
  2. Step 2: Convert to fraction form
    25,486.40/38,171.39 = 12,168.76/x
  3. Step 3: Cross multiply
    25,486.40x = 38,171.39 × 12,168.76
  4. Step 4: Simplify right side
    25,486.40x = 464,498,483.78
  5. Step 5: Solve for x
    x = 464,498,483.78/25,486.40
  6. Step 6: Final answer
    x = 18,225.35

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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.