Home / 20,310.18-28,031.22-12,354.90

Finding the Fourth Proportional to 20,310.18, 28,031.22 and 12,354.90

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Solution

The fourth proportional to 20,310.18, 28,031.22 and 12,354.90 is: 17,051.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,310.18 : 28,031.22 = 12,354.90 : x
  2. Step 2: Convert to fraction form
    20,310.18/28,031.22 = 12,354.90/x
  3. Step 3: Cross multiply
    20,310.18x = 28,031.22 × 12,354.90
  4. Step 4: Simplify right side
    20,310.18x = 346,322,919.98
  5. Step 5: Solve for x
    x = 346,322,919.98/20,310.18
  6. Step 6: Final answer
    x = 17,051.69

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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.