Home / 20,426.31-28,188.99-11,475.39

Finding the Fourth Proportional to 20,426.31, 28,188.99 and 11,475.39

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Solution

The fourth proportional to 20,426.31, 28,188.99 and 11,475.39 is: 15,836.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,426.31 : 28,188.99 = 11,475.39 : x
  2. Step 2: Convert to fraction form
    20,426.31/28,188.99 = 11,475.39/x
  3. Step 3: Cross multiply
    20,426.31x = 28,188.99 × 11,475.39
  4. Step 4: Simplify right side
    20,426.31x = 323,479,653.96
  5. Step 5: Solve for x
    x = 323,479,653.96/20,426.31
  6. Step 6: Final answer
    x = 15,836.42

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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.