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Finding the Fourth Proportional to 28,878.32, 39,848.02 and 16,129.73

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Solution

The fourth proportional to 28,878.32, 39,848.02 and 16,129.73 is: 22,256.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,878.32 : 39,848.02 = 16,129.73 : x
  2. Step 2: Convert to fraction form
    28,878.32/39,848.02 = 16,129.73/x
  3. Step 3: Cross multiply
    28,878.32x = 39,848.02 × 16,129.73
  4. Step 4: Simplify right side
    28,878.32x = 642,737,862.93
  5. Step 5: Solve for x
    x = 642,737,862.93/28,878.32
  6. Step 6: Final answer
    x = 22,256.76

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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.