Home / 20,805,279.20-31,207,918.80-20,506,680.80

Finding the Fourth Proportional to 20,805,279.20, 31,207,918.80 and 20,506,680.80

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Solution

The fourth proportional to 20,805,279.20, 31,207,918.80 and 20,506,680.80 is: 30,760,021.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805,279.20 : 31,207,918.80 = 20,506,680.80 : x
  2. Step 2: Convert to fraction form
    20,805,279.20/31,207,918.80 = 20,506,680.80/x
  3. Step 3: Cross multiply
    20,805,279.20x = 31,207,918.80 × 20,506,680.80
  4. Step 4: Simplify right side
    20,805,279.20x = 639,970,829,263,919.12
  5. Step 5: Solve for x
    x = 639,970,829,263,919.12/20,805,279.20
  6. Step 6: Final answer
    x = 30,760,021.20

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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.