Home / 15,945.80-21,982.39-11,215.40

Finding the Fourth Proportional to 15,945.80, 21,982.39 and 11,215.40

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Solution

The fourth proportional to 15,945.80, 21,982.39 and 11,215.40 is: 15,461.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,945.80 : 21,982.39 = 11,215.40 : x
  2. Step 2: Convert to fraction form
    15,945.80/21,982.39 = 11,215.40/x
  3. Step 3: Cross multiply
    15,945.80x = 21,982.39 × 11,215.40
  4. Step 4: Simplify right side
    15,945.80x = 246,541,158.86
  5. Step 5: Solve for x
    x = 246,541,158.86/15,945.80
  6. Step 6: Final answer
    x = 15,461.20

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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.