Home / 20,979.09-28,950.08-11,545.83

Finding the Fourth Proportional to 20,979.09, 28,950.08 and 11,545.83

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Solution

The fourth proportional to 20,979.09, 28,950.08 and 11,545.83 is: 15,932.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.09 : 28,950.08 = 11,545.83 : x
  2. Step 2: Convert to fraction form
    20,979.09/28,950.08 = 11,545.83/x
  3. Step 3: Cross multiply
    20,979.09x = 28,950.08 × 11,545.83
  4. Step 4: Simplify right side
    20,979.09x = 334,252,644.44
  5. Step 5: Solve for x
    x = 334,252,644.44/20,979.09
  6. Step 6: Final answer
    x = 15,932.66

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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.