Home / 20,386.48-28,131.68-11,432.76

Finding the Fourth Proportional to 20,386.48, 28,131.68 and 11,432.76

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Solution

The fourth proportional to 20,386.48, 28,131.68 and 11,432.76 is: 15,776.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.48 : 28,131.68 = 11,432.76 : x
  2. Step 2: Convert to fraction form
    20,386.48/28,131.68 = 11,432.76/x
  3. Step 3: Cross multiply
    20,386.48x = 28,131.68 × 11,432.76
  4. Step 4: Simplify right side
    20,386.48x = 321,622,745.84
  5. Step 5: Solve for x
    x = 321,622,745.84/20,386.48
  6. Step 6: Final answer
    x = 15,776.28

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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.