Home / 20,488.27-28,271.61-11,535.61

Finding the Fourth Proportional to 20,488.27, 28,271.61 and 11,535.61

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Solution

The fourth proportional to 20,488.27, 28,271.61 and 11,535.61 is: 15,917.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.27 : 28,271.61 = 11,535.61 : x
  2. Step 2: Convert to fraction form
    20,488.27/28,271.61 = 11,535.61/x
  3. Step 3: Cross multiply
    20,488.27x = 28,271.61 × 11,535.61
  4. Step 4: Simplify right side
    20,488.27x = 326,130,196.35
  5. Step 5: Solve for x
    x = 326,130,196.35/20,488.27
  6. Step 6: Final answer
    x = 15,917.90

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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.