Home / 20,619.80-28,455.54-11,667.40

Finding the Fourth Proportional to 20,619.80, 28,455.54 and 11,667.40

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Solution

The fourth proportional to 20,619.80, 28,455.54 and 11,667.40 is: 16,101.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.80 : 28,455.54 = 11,667.40 : x
  2. Step 2: Convert to fraction form
    20,619.80/28,455.54 = 11,667.40/x
  3. Step 3: Cross multiply
    20,619.80x = 28,455.54 × 11,667.40
  4. Step 4: Simplify right side
    20,619.80x = 332,002,167.40
  5. Step 5: Solve for x
    x = 332,002,167.40/20,619.80
  6. Step 6: Final answer
    x = 16,101.13

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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.