Home / 28,207.90-42,311.76-8,486.43

Finding the Fourth Proportional to 28,207.90, 42,311.76 and 8,486.43

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Solution

The fourth proportional to 28,207.90, 42,311.76 and 8,486.43 is: 12,729.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,207.90 : 42,311.76 = 8,486.43 : x
  2. Step 2: Convert to fraction form
    28,207.90/42,311.76 = 8,486.43/x
  3. Step 3: Cross multiply
    28,207.90x = 42,311.76 × 8,486.43
  4. Step 4: Simplify right side
    28,207.90x = 359,075,789.42
  5. Step 5: Solve for x
    x = 359,075,789.42/28,207.90
  6. Step 6: Final answer
    x = 12,729.62

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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.