Home / 13,820.20-20,730.30-10,539.70

Finding the Fourth Proportional to 13,820.20, 20,730.30 and 10,539.70

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Solution

The fourth proportional to 13,820.20, 20,730.30 and 10,539.70 is: 15,809.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.20 : 20,730.30 = 10,539.70 : x
  2. Step 2: Convert to fraction form
    13,820.20/20,730.30 = 10,539.70/x
  3. Step 3: Cross multiply
    13,820.20x = 20,730.30 × 10,539.70
  4. Step 4: Simplify right side
    13,820.20x = 218,491,142.91
  5. Step 5: Solve for x
    x = 218,491,142.91/13,820.20
  6. Step 6: Final answer
    x = 15,809.55

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1.5x scale

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.