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Finding the Fourth Proportional to 28,902.80, 39,885.02 and 16,156.00

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Solution

The fourth proportional to 28,902.80, 39,885.02 and 16,156.00 is: 22,294.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,902.80 : 39,885.02 = 16,156.00 : x
  2. Step 2: Convert to fraction form
    28,902.80/39,885.02 = 16,156.00/x
  3. Step 3: Cross multiply
    28,902.80x = 39,885.02 × 16,156.00
  4. Step 4: Simplify right side
    28,902.80x = 644,382,412.78
  5. Step 5: Solve for x
    x = 644,382,412.78/28,902.80
  6. Step 6: Final answer
    x = 22,294.81

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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.