Home / 21,036,811.20-31,555,216.80-20,186,505.60

Finding the Fourth Proportional to 21,036,811.20, 31,555,216.80 and 20,186,505.60

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Solution

The fourth proportional to 21,036,811.20, 31,555,216.80 and 20,186,505.60 is: 30,279,758.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,036,811.20 : 31,555,216.80 = 20,186,505.60 : x
  2. Step 2: Convert to fraction form
    21,036,811.20/31,555,216.80 = 20,186,505.60/x
  3. Step 3: Cross multiply
    21,036,811.20x = 31,555,216.80 × 20,186,505.60
  4. Step 4: Simplify right side
    21,036,811.20x = 636,989,560,642,414.12
  5. Step 5: Solve for x
    x = 636,989,560,642,414.12/21,036,811.20
  6. Step 6: Final answer
    x = 30,279,758.40

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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.