Home / 20,809,155.31-28,716,422.80-11,516,743.42

Finding the Fourth Proportional to 20,809,155.31, 28,716,422.80 and 11,516,743.42

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Solution

The fourth proportional to 20,809,155.31, 28,716,422.80 and 11,516,743.42 is: 15,892,988.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809,155.31 : 28,716,422.80 = 11,516,743.42 : x
  2. Step 2: Convert to fraction form
    20,809,155.31/28,716,422.80 = 11,516,743.42/x
  3. Step 3: Cross multiply
    20,809,155.31x = 28,716,422.80 × 11,516,743.42
  4. Step 4: Simplify right side
    20,809,155.31x = 330,719,673,155,464
  5. Step 5: Solve for x
    x = 330,719,673,155,464/20,809,155.31
  6. Step 6: Final answer
    x = 15,892,988.85

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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.