Home / 13,123.38-18,110.13-7,154.92

Finding the Fourth Proportional to 13,123.38, 18,110.13 and 7,154.92

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Solution

The fourth proportional to 13,123.38, 18,110.13 and 7,154.92 is: 9,873.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,123.38 : 18,110.13 = 7,154.92 : x
  2. Step 2: Convert to fraction form
    13,123.38/18,110.13 = 7,154.92/x
  3. Step 3: Cross multiply
    13,123.38x = 18,110.13 × 7,154.92
  4. Step 4: Simplify right side
    13,123.38x = 129,576,531.34
  5. Step 5: Solve for x
    x = 129,576,531.34/13,123.38
  6. Step 6: Final answer
    x = 9,873.72

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Half scale
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Double scale
Find fourth proportional to 13,124.38, 18,111.51 and 7,155.92
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.