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Finding the Fourth Proportional to 34,876.71, 48,129.75 and 18,961.20

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Solution

The fourth proportional to 34,876.71, 48,129.75 and 18,961.20 is: 26,166.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,876.71 : 48,129.75 = 18,961.20 : x
  2. Step 2: Convert to fraction form
    34,876.71/48,129.75 = 18,961.20/x
  3. Step 3: Cross multiply
    34,876.71x = 48,129.75 × 18,961.20
  4. Step 4: Simplify right side
    34,876.71x = 912,597,815.70
  5. Step 5: Solve for x
    x = 912,597,815.70/34,876.71
  6. Step 6: Final answer
    x = 26,166.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.