Home / 20,426.80-28,191.61-11,474.30

Finding the Fourth Proportional to 20,426.80, 28,191.61 and 11,474.30

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Solution

The fourth proportional to 20,426.80, 28,191.61 and 11,474.30 is: 15,836.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,426.80 : 28,191.61 = 11,474.30 : x
  2. Step 2: Convert to fraction form
    20,426.80/28,191.61 = 11,474.30/x
  3. Step 3: Cross multiply
    20,426.80x = 28,191.61 × 11,474.30
  4. Step 4: Simplify right side
    20,426.80x = 323,478,849.66
  5. Step 5: Solve for x
    x = 323,478,849.66/20,426.80
  6. Step 6: Final answer
    x = 15,836.01

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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.