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Finding the Fourth Proportional to 28,910.40, 39,895.88 and 16,162.88

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Solution

The fourth proportional to 28,910.40, 39,895.88 and 16,162.88 is: 22,304.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,910.40 : 39,895.88 = 16,162.88 : x
  2. Step 2: Convert to fraction form
    28,910.40/39,895.88 = 16,162.88/x
  3. Step 3: Cross multiply
    28,910.40x = 39,895.88 × 16,162.88
  4. Step 4: Simplify right side
    28,910.40x = 644,832,320.93
  5. Step 5: Solve for x
    x = 644,832,320.93/28,910.40
  6. Step 6: Final answer
    x = 22,304.51

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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.