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Finding the Fourth Proportional to 18,669, 25,763.30 and 11,115.62

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Solution

The fourth proportional to 18,669, 25,763.30 and 11,115.62 is: 15,339.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669 : 25,763.30 = 11,115.62 : x
  2. Step 2: Convert to fraction form
    18,669/25,763.30 = 11,115.62/x
  3. Step 3: Cross multiply
    18,669x = 25,763.30 × 11,115.62
  4. Step 4: Simplify right side
    18,669x = 286,375,052.75
  5. Step 5: Solve for x
    x = 286,375,052.75/18,669
  6. Step 6: Final answer
    x = 15,339.60

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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.