Home / 20,488.86-28,275.16-11,536.68

Finding the Fourth Proportional to 20,488.86, 28,275.16 and 11,536.68

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Solution

The fourth proportional to 20,488.86, 28,275.16 and 11,536.68 is: 15,920.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.86 : 28,275.16 = 11,536.68 : x
  2. Step 2: Convert to fraction form
    20,488.86/28,275.16 = 11,536.68/x
  3. Step 3: Cross multiply
    20,488.86x = 28,275.16 × 11,536.68
  4. Step 4: Simplify right side
    20,488.86x = 326,201,472.87
  5. Step 5: Solve for x
    x = 326,201,472.87/20,488.86
  6. Step 6: Final answer
    x = 15,920.92

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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.