Home / 28,279.44-39,003.72-20,722.92

Finding the Fourth Proportional to 28,279.44, 39,003.72 and 20,722.92

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Solution

The fourth proportional to 28,279.44, 39,003.72 and 20,722.92 is: 28,581.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,279.44 : 39,003.72 = 20,722.92 : x
  2. Step 2: Convert to fraction form
    28,279.44/39,003.72 = 20,722.92/x
  3. Step 3: Cross multiply
    28,279.44x = 39,003.72 × 20,722.92
  4. Step 4: Simplify right side
    28,279.44x = 808,270,969.26
  5. Step 5: Solve for x
    x = 808,270,969.26/28,279.44
  6. Step 6: Final answer
    x = 28,581.58

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Half scale
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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.