Home / 10,890.14-15,021.23-8,648.46

Finding the Fourth Proportional to 10,890.14, 15,021.23 and 8,648.46

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Solution

The fourth proportional to 10,890.14, 15,021.23 and 8,648.46 is: 11,929.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,890.14 : 15,021.23 = 8,648.46 : x
  2. Step 2: Convert to fraction form
    10,890.14/15,021.23 = 8,648.46/x
  3. Step 3: Cross multiply
    10,890.14x = 15,021.23 × 8,648.46
  4. Step 4: Simplify right side
    10,890.14x = 129,910,463.56
  5. Step 5: Solve for x
    x = 129,910,463.56/10,890.14
  6. Step 6: Final answer
    x = 11,929.19

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Double scale
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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.