Home / 11,320.72-15,590.30-8,171.92

Finding the Fourth Proportional to 11,320.72, 15,590.30 and 8,171.92

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Solution

The fourth proportional to 11,320.72, 15,590.30 and 8,171.92 is: 11,253.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,320.72 : 15,590.30 = 8,171.92 : x
  2. Step 2: Convert to fraction form
    11,320.72/15,590.30 = 8,171.92/x
  3. Step 3: Cross multiply
    11,320.72x = 15,590.30 × 8,171.92
  4. Step 4: Simplify right side
    11,320.72x = 127,402,684.38
  5. Step 5: Solve for x
    x = 127,402,684.38/11,320.72
  6. Step 6: Final answer
    x = 11,253.94

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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.