Home / 20,272.90-27,976.60-11,320.40

Finding the Fourth Proportional to 20,272.90, 27,976.60 and 11,320.40

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Solution

The fourth proportional to 20,272.90, 27,976.60 and 11,320.40 is: 15,622.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.90 : 27,976.60 = 11,320.40 : x
  2. Step 2: Convert to fraction form
    20,272.90/27,976.60 = 11,320.40/x
  3. Step 3: Cross multiply
    20,272.90x = 27,976.60 × 11,320.40
  4. Step 4: Simplify right side
    20,272.90x = 316,706,302.64
  5. Step 5: Solve for x
    x = 316,706,302.64/20,272.90
  6. Step 6: Final answer
    x = 15,622.15

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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.