Home / 20,542.98-30,820.65-8,690.66

Finding the Fourth Proportional to 20,542.98, 30,820.65 and 8,690.66

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Solution

The fourth proportional to 20,542.98, 30,820.65 and 8,690.66 is: 13,038.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,542.98 : 30,820.65 = 8,690.66 : x
  2. Step 2: Convert to fraction form
    20,542.98/30,820.65 = 8,690.66/x
  3. Step 3: Cross multiply
    20,542.98x = 30,820.65 × 8,690.66
  4. Step 4: Simplify right side
    20,542.98x = 267,851,636.03
  5. Step 5: Solve for x
    x = 267,851,636.03/20,542.98
  6. Step 6: Final answer
    x = 13,038.60

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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.