Home / 20,291.15-28,001.61-11,338.55

Finding the Fourth Proportional to 20,291.15, 28,001.61 and 11,338.55

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Solution

The fourth proportional to 20,291.15, 28,001.61 and 11,338.55 is: 15,647.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.15 : 28,001.61 = 11,338.55 : x
  2. Step 2: Convert to fraction form
    20,291.15/28,001.61 = 11,338.55/x
  3. Step 3: Cross multiply
    20,291.15x = 28,001.61 × 11,338.55
  4. Step 4: Simplify right side
    20,291.15x = 317,497,515.06
  5. Step 5: Solve for x
    x = 317,497,515.06/20,291.15
  6. Step 6: Final answer
    x = 15,647.10

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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.