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Finding the Fourth Proportional to 18,109.78, 24,985.59 and 10,554.38

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Solution

The fourth proportional to 18,109.78, 24,985.59 and 10,554.38 is: 14,561.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,109.78 : 24,985.59 = 10,554.38 : x
  2. Step 2: Convert to fraction form
    18,109.78/24,985.59 = 10,554.38/x
  3. Step 3: Cross multiply
    18,109.78x = 24,985.59 × 10,554.38
  4. Step 4: Simplify right side
    18,109.78x = 263,707,340.57
  5. Step 5: Solve for x
    x = 263,707,340.57/18,109.78
  6. Step 6: Final answer
    x = 14,561.60

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Double scale
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Similar ratio
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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.