Home / 28,220.38-38,944.12-15,645.12

Finding the Fourth Proportional to 28,220.38, 38,944.12 and 15,645.12

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Solution

The fourth proportional to 28,220.38, 38,944.12 and 15,645.12 is: 21,590.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220.38 : 38,944.12 = 15,645.12 : x
  2. Step 2: Convert to fraction form
    28,220.38/38,944.12 = 15,645.12/x
  3. Step 3: Cross multiply
    28,220.38x = 38,944.12 × 15,645.12
  4. Step 4: Simplify right side
    28,220.38x = 609,285,430.69
  5. Step 5: Solve for x
    x = 609,285,430.69/28,220.38
  6. Step 6: Final answer
    x = 21,590.26

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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.