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Finding the Fourth Proportional to 28,076.66, 38,746.29 and 15,500.66

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Solution

The fourth proportional to 28,076.66, 38,746.29 and 15,500.66 is: 21,391.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,076.66 : 38,746.29 = 15,500.66 : x
  2. Step 2: Convert to fraction form
    28,076.66/38,746.29 = 15,500.66/x
  3. Step 3: Cross multiply
    28,076.66x = 38,746.29 × 15,500.66
  4. Step 4: Simplify right side
    28,076.66x = 600,593,067.55
  5. Step 5: Solve for x
    x = 600,593,067.55/28,076.66
  6. Step 6: Final answer
    x = 21,391.19

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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.