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Finding the Fourth Proportional to 34,218.80, 51,337.80 and 16,689.20

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Solution

The fourth proportional to 34,218.80, 51,337.80 and 16,689.20 is: 25,038.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,218.80 : 51,337.80 = 16,689.20 : x
  2. Step 2: Convert to fraction form
    34,218.80/51,337.80 = 16,689.20/x
  3. Step 3: Cross multiply
    34,218.80x = 51,337.80 × 16,689.20
  4. Step 4: Simplify right side
    34,218.80x = 856,786,811.76
  5. Step 5: Solve for x
    x = 856,786,811.76/34,218.80
  6. Step 6: Final answer
    x = 25,038.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.