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Finding the Fourth Proportional to 18,251.19, 25,180.47 and 14,888.21

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Solution

The fourth proportional to 18,251.19, 25,180.47 and 14,888.21 is: 20,540.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,251.19 : 25,180.47 = 14,888.21 : x
  2. Step 2: Convert to fraction form
    18,251.19/25,180.47 = 14,888.21/x
  3. Step 3: Cross multiply
    18,251.19x = 25,180.47 × 14,888.21
  4. Step 4: Simplify right side
    18,251.19x = 374,891,999.36
  5. Step 5: Solve for x
    x = 374,891,999.36/18,251.19
  6. Step 6: Final answer
    x = 20,540.69

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Half scale
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Double scale
Find fourth proportional to 18,252.19, 25,181.85 and 14,889.21
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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.