Home / 18,869.13-28,276.88-13,899.69

Finding the Fourth Proportional to 18,869.13, 28,276.88 and 13,899.69

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Solution

The fourth proportional to 18,869.13, 28,276.88 and 13,899.69 is: 20,829.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.13 : 28,276.88 = 13,899.69 : x
  2. Step 2: Convert to fraction form
    18,869.13/28,276.88 = 13,899.69/x
  3. Step 3: Cross multiply
    18,869.13x = 28,276.88 × 13,899.69
  4. Step 4: Simplify right side
    18,869.13x = 393,039,796.67
  5. Step 5: Solve for x
    x = 393,039,796.67/18,869.13
  6. Step 6: Final answer
    x = 20,829.78

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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.