Home / 11,370.70-15,681.18-8,221.42

Finding the Fourth Proportional to 11,370.70, 15,681.18 and 8,221.42

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Solution

The fourth proportional to 11,370.70, 15,681.18 and 8,221.42 is: 11,338.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,370.70 : 15,681.18 = 8,221.42 : x
  2. Step 2: Convert to fraction form
    11,370.70/15,681.18 = 8,221.42/x
  3. Step 3: Cross multiply
    11,370.70x = 15,681.18 × 8,221.42
  4. Step 4: Simplify right side
    11,370.70x = 128,921,566.88
  5. Step 5: Solve for x
    x = 128,921,566.88/11,370.70
  6. Step 6: Final answer
    x = 11,338.05

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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.