Home / 20,488.81-28,272.22-11,536.08

Finding the Fourth Proportional to 20,488.81, 28,272.22 and 11,536.08

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Solution

The fourth proportional to 20,488.81, 28,272.22 and 11,536.08 is: 15,918.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.81 : 28,272.22 = 11,536.08 : x
  2. Step 2: Convert to fraction form
    20,488.81/28,272.22 = 11,536.08/x
  3. Step 3: Cross multiply
    20,488.81x = 28,272.22 × 11,536.08
  4. Step 4: Simplify right side
    20,488.81x = 326,150,562.86
  5. Step 5: Solve for x
    x = 326,150,562.86/20,488.81
  6. Step 6: Final answer
    x = 15,918.47

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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.