Home / 15,427.38-21,289.75-8,712.69

Finding the Fourth Proportional to 15,427.38, 21,289.75 and 8,712.69

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Solution

The fourth proportional to 15,427.38, 21,289.75 and 8,712.69 is: 12,023.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,427.38 : 21,289.75 = 8,712.69 : x
  2. Step 2: Convert to fraction form
    15,427.38/21,289.75 = 8,712.69/x
  3. Step 3: Cross multiply
    15,427.38x = 21,289.75 × 8,712.69
  4. Step 4: Simplify right side
    15,427.38x = 185,490,991.93
  5. Step 5: Solve for x
    x = 185,490,991.93/15,427.38
  6. Step 6: Final answer
    x = 12,023.49

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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.