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Finding the Fourth Proportional to 28,202.96, 38,919.96 and 15,627.68

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Solution

The fourth proportional to 28,202.96, 38,919.96 and 15,627.68 is: 21,566.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,202.96 : 38,919.96 = 15,627.68 : x
  2. Step 2: Convert to fraction form
    28,202.96/38,919.96 = 15,627.68/x
  3. Step 3: Cross multiply
    28,202.96x = 38,919.96 × 15,627.68
  4. Step 4: Simplify right side
    28,202.96x = 608,228,680.49
  5. Step 5: Solve for x
    x = 608,228,680.49/28,202.96
  6. Step 6: Final answer
    x = 21,566.13

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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.