Home / 20,700.20-28,567.62-12,315.56

Finding the Fourth Proportional to 20,700.20, 28,567.62 and 12,315.56

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Solution

The fourth proportional to 20,700.20, 28,567.62 and 12,315.56 is: 16,996.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.20 : 28,567.62 = 12,315.56 : x
  2. Step 2: Convert to fraction form
    20,700.20/28,567.62 = 12,315.56/x
  3. Step 3: Cross multiply
    20,700.20x = 28,567.62 × 12,315.56
  4. Step 4: Simplify right side
    20,700.20x = 351,826,238.17
  5. Step 5: Solve for x
    x = 351,826,238.17/20,700.20
  6. Step 6: Final answer
    x = 16,996.27

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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.