Home / 13,800.13-20,700.33-3,411.88

Finding the Fourth Proportional to 13,800.13, 20,700.33 and 3,411.88

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Solution

The fourth proportional to 13,800.13, 20,700.33 and 3,411.88 is: 5,117.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,800.13 : 20,700.33 = 3,411.88 : x
  2. Step 2: Convert to fraction form
    13,800.13/20,700.33 = 3,411.88/x
  3. Step 3: Cross multiply
    13,800.13x = 20,700.33 × 3,411.88
  4. Step 4: Simplify right side
    13,800.13x = 70,627,041.92
  5. Step 5: Solve for x
    x = 70,627,041.92/13,800.13
  6. Step 6: Final answer
    x = 5,117.85

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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.