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Finding the Fourth Proportional to 28,201.92, 38,918.88 and 15,626.88

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Solution

The fourth proportional to 28,201.92, 38,918.88 and 15,626.88 is: 21,565.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,201.92 : 38,918.88 = 15,626.88 : x
  2. Step 2: Convert to fraction form
    28,201.92/38,918.88 = 15,626.88/x
  3. Step 3: Cross multiply
    28,201.92x = 38,918.88 × 15,626.88
  4. Step 4: Simplify right side
    28,201.92x = 608,180,667.49
  5. Step 5: Solve for x
    x = 608,180,667.49/28,201.92
  6. Step 6: Final answer
    x = 21,565.22

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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.