Home / 20,291.12-28,001.21-11,338.68

Finding the Fourth Proportional to 20,291.12, 28,001.21 and 11,338.68

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Solution

The fourth proportional to 20,291.12, 28,001.21 and 11,338.68 is: 15,647.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.12 : 28,001.21 = 11,338.68 : x
  2. Step 2: Convert to fraction form
    20,291.12/28,001.21 = 11,338.68/x
  3. Step 3: Cross multiply
    20,291.12x = 28,001.21 × 11,338.68
  4. Step 4: Simplify right side
    20,291.12x = 317,496,759.80
  5. Step 5: Solve for x
    x = 317,496,759.80/20,291.12
  6. Step 6: Final answer
    x = 15,647.08

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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.