Home / 20,653.66-28,502.31-11,222.38

Finding the Fourth Proportional to 20,653.66, 28,502.31 and 11,222.38

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Solution

The fourth proportional to 20,653.66, 28,502.31 and 11,222.38 is: 15,487.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.66 : 28,502.31 = 11,222.38 : x
  2. Step 2: Convert to fraction form
    20,653.66/28,502.31 = 11,222.38/x
  3. Step 3: Cross multiply
    20,653.66x = 28,502.31 × 11,222.38
  4. Step 4: Simplify right side
    20,653.66x = 319,863,753.70
  5. Step 5: Solve for x
    x = 319,863,753.70/20,653.66
  6. Step 6: Final answer
    x = 15,487.03

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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.