Home / 20,909.14-28,854.83-11,349.11

Finding the Fourth Proportional to 20,909.14, 28,854.83 and 11,349.11

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Solution

The fourth proportional to 20,909.14, 28,854.83 and 11,349.11 is: 15,661.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.14 : 28,854.83 = 11,349.11 : x
  2. Step 2: Convert to fraction form
    20,909.14/28,854.83 = 11,349.11/x
  3. Step 3: Cross multiply
    20,909.14x = 28,854.83 × 11,349.11
  4. Step 4: Simplify right side
    20,909.14x = 327,476,639.70
  5. Step 5: Solve for x
    x = 327,476,639.70/20,909.14
  6. Step 6: Final answer
    x = 15,661.89

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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.