Home / 20,992,986.34-31,585,532.55-12,479,695.18

Finding the Fourth Proportional to 20,992,986.34, 31,585,532.55 and 12,479,695.18

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Solution

The fourth proportional to 20,992,986.34, 31,585,532.55 and 12,479,695.18 is: 18,776,643.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992,986.34 : 31,585,532.55 = 12,479,695.18 : x
  2. Step 2: Convert to fraction form
    20,992,986.34/31,585,532.55 = 12,479,695.18/x
  3. Step 3: Cross multiply
    20,992,986.34x = 31,585,532.55 × 12,479,695.18
  4. Step 4: Simplify right side
    20,992,986.34x = 394,177,818,321,968.12
  5. Step 5: Solve for x
    x = 394,177,818,321,968.12/20,992,986.34
  6. Step 6: Final answer
    x = 18,776,643.40

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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.