Home / 13,141.38-18,135.65-7,477.13

Finding the Fourth Proportional to 13,141.38, 18,135.65 and 7,477.13

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Solution

The fourth proportional to 13,141.38, 18,135.65 and 7,477.13 is: 10,318.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.38 : 18,135.65 = 7,477.13 : x
  2. Step 2: Convert to fraction form
    13,141.38/18,135.65 = 7,477.13/x
  3. Step 3: Cross multiply
    13,141.38x = 18,135.65 × 7,477.13
  4. Step 4: Simplify right side
    13,141.38x = 135,602,612.68
  5. Step 5: Solve for x
    x = 135,602,612.68/13,141.38
  6. Step 6: Final answer
    x = 10,318.75

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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.