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Finding the Fourth Proportional to 18,362.69, 25,340.71 and 9,979.19

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Solution

The fourth proportional to 18,362.69, 25,340.71 and 9,979.19 is: 13,771.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,362.69 : 25,340.71 = 9,979.19 : x
  2. Step 2: Convert to fraction form
    18,362.69/25,340.71 = 9,979.19/x
  3. Step 3: Cross multiply
    18,362.69x = 25,340.71 × 9,979.19
  4. Step 4: Simplify right side
    18,362.69x = 252,879,759.82
  5. Step 5: Solve for x
    x = 252,879,759.82/18,362.69
  6. Step 6: Final answer
    x = 13,771.39

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Half scale
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Double scale
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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.