Home / 20,292.85-30,443.60-11,979.06

Finding the Fourth Proportional to 20,292.85, 30,443.60 and 11,979.06

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Solution

The fourth proportional to 20,292.85, 30,443.60 and 11,979.06 is: 17,971.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,292.85 : 30,443.60 = 11,979.06 : x
  2. Step 2: Convert to fraction form
    20,292.85/30,443.60 = 11,979.06/x
  3. Step 3: Cross multiply
    20,292.85x = 30,443.60 × 11,979.06
  4. Step 4: Simplify right side
    20,292.85x = 364,685,711.02
  5. Step 5: Solve for x
    x = 364,685,711.02/20,292.85
  6. Step 6: Final answer
    x = 17,971.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.