Home / 20,685,808.80-31,028,713.20-18,453,756.60

Finding the Fourth Proportional to 20,685,808.80, 31,028,713.20 and 18,453,756.60

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Solution

The fourth proportional to 20,685,808.80, 31,028,713.20 and 18,453,756.60 is: 27,680,634.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685,808.80 : 31,028,713.20 = 18,453,756.60 : x
  2. Step 2: Convert to fraction form
    20,685,808.80/31,028,713.20 = 18,453,756.60/x
  3. Step 3: Cross multiply
    20,685,808.80x = 31,028,713.20 × 18,453,756.60
  4. Step 4: Simplify right side
    20,685,808.80x = 572,596,321,004,007.12
  5. Step 5: Solve for x
    x = 572,596,321,004,007.12/20,685,808.80
  6. Step 6: Final answer
    x = 27,680,634.90

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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.