Home / 21,138,680.80-31,708,021.20-5,182,328.80

Finding the Fourth Proportional to 21,138,680.80, 31,708,021.20 and 5,182,328.80

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Solution

The fourth proportional to 21,138,680.80, 31,708,021.20 and 5,182,328.80 is: 7,773,493.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138,680.80 : 31,708,021.20 = 5,182,328.80 : x
  2. Step 2: Convert to fraction form
    21,138,680.80/31,708,021.20 = 5,182,328.80/x
  3. Step 3: Cross multiply
    21,138,680.80x = 31,708,021.20 × 5,182,328.80
  4. Step 4: Simplify right side
    21,138,680.80x = 164,321,391,455,770.56
  5. Step 5: Solve for x
    x = 164,321,391,455,770.56/21,138,680.80
  6. Step 6: Final answer
    x = 7,773,493.20

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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.