Home / 20,488.87-28,275.16-11,536.69

Finding the Fourth Proportional to 20,488.87, 28,275.16 and 11,536.69

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Solution

The fourth proportional to 20,488.87, 28,275.16 and 11,536.69 is: 15,920.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.87 : 28,275.16 = 11,536.69 : x
  2. Step 2: Convert to fraction form
    20,488.87/28,275.16 = 11,536.69/x
  3. Step 3: Cross multiply
    20,488.87x = 28,275.16 × 11,536.69
  4. Step 4: Simplify right side
    20,488.87x = 326,201,614.24
  5. Step 5: Solve for x
    x = 326,201,614.24/20,488.87
  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.