Home / 20,805,379.20-31,208,068.80-20,506,780.80

Finding the Fourth Proportional to 20,805,379.20, 31,208,068.80 and 20,506,780.80

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Solution

The fourth proportional to 20,805,379.20, 31,208,068.80 and 20,506,780.80 is: 30,760,171.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805,379.20 : 31,208,068.80 = 20,506,780.80 : x
  2. Step 2: Convert to fraction form
    20,805,379.20/31,208,068.80 = 20,506,780.80/x
  3. Step 3: Cross multiply
    20,805,379.20x = 31,208,068.80 × 20,506,780.80
  4. Step 4: Simplify right side
    20,805,379.20x = 639,977,026,072,919.12
  5. Step 5: Solve for x
    x = 639,977,026,072,919.12/20,805,379.20
  6. Step 6: Final answer
    x = 30,760,171.20

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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.