Home / 18,128.72-25,011.18-11,414.76

Finding the Fourth Proportional to 18,128.72, 25,011.18 and 11,414.76

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Solution

The fourth proportional to 18,128.72, 25,011.18 and 11,414.76 is: 15,748.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.72 : 25,011.18 = 11,414.76 : x
  2. Step 2: Convert to fraction form
    18,128.72/25,011.18 = 11,414.76/x
  3. Step 3: Cross multiply
    18,128.72x = 25,011.18 × 11,414.76
  4. Step 4: Simplify right side
    18,128.72x = 285,496,617.02
  5. Step 5: Solve for x
    x = 285,496,617.02/18,128.72
  6. Step 6: Final answer
    x = 15,748.31

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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.