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Finding the Fourth Proportional to 18,581.58, 25,640.89 and 11,026.61

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Solution

The fourth proportional to 18,581.58, 25,640.89 and 11,026.61 is: 15,215.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,581.58 : 25,640.89 = 11,026.61 : x
  2. Step 2: Convert to fraction form
    18,581.58/25,640.89 = 11,026.61/x
  3. Step 3: Cross multiply
    18,581.58x = 25,640.89 × 11,026.61
  4. Step 4: Simplify right side
    18,581.58x = 282,732,094.08
  5. Step 5: Solve for x
    x = 282,732,094.08/18,581.58
  6. Step 6: Final answer
    x = 15,215.72

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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.