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Finding the Fourth Proportional to 15,125.18, 20,873.61 and 8,411.54

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Solution

The fourth proportional to 15,125.18, 20,873.61 and 8,411.54 is: 11,608.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,125.18 : 20,873.61 = 8,411.54 : x
  2. Step 2: Convert to fraction form
    15,125.18/20,873.61 = 8,411.54/x
  3. Step 3: Cross multiply
    15,125.18x = 20,873.61 × 8,411.54
  4. Step 4: Simplify right side
    15,125.18x = 175,579,101.09
  5. Step 5: Solve for x
    x = 175,579,101.09/15,125.18
  6. Step 6: Final answer
    x = 11,608.40

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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.