Home / 20,220.10-30,348.15-11,889.70

Finding the Fourth Proportional to 20,220.10, 30,348.15 and 11,889.70

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Solution

The fourth proportional to 20,220.10, 30,348.15 and 11,889.70 is: 17,845.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.10 : 30,348.15 = 11,889.70 : x
  2. Step 2: Convert to fraction form
    20,220.10/30,348.15 = 11,889.70/x
  3. Step 3: Cross multiply
    20,220.10x = 30,348.15 × 11,889.70
  4. Step 4: Simplify right side
    20,220.10x = 360,830,399.06
  5. Step 5: Solve for x
    x = 360,830,399.06/20,220.10
  6. Step 6: Final answer
    x = 17,845.13

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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.