Home / 28,279.90-39,026.70-15,532.72

Finding the Fourth Proportional to 28,279.90, 39,026.70 and 15,532.72

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Solution

The fourth proportional to 28,279.90, 39,026.70 and 15,532.72 is: 21,435.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,279.90 : 39,026.70 = 15,532.72 : x
  2. Step 2: Convert to fraction form
    28,279.90/39,026.70 = 15,532.72/x
  3. Step 3: Cross multiply
    28,279.90x = 39,026.70 × 15,532.72
  4. Step 4: Simplify right side
    28,279.90x = 606,190,803.62
  5. Step 5: Solve for x
    x = 606,190,803.62/28,279.90
  6. Step 6: Final answer
    x = 21,435.39

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Half 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.