Home / 20,729,195.65-28,615,462.52-13,390,606.43

Finding the Fourth Proportional to 20,729,195.65, 28,615,462.52 and 13,390,606.43

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Solution

The fourth proportional to 20,729,195.65, 28,615,462.52 and 13,390,606.43 is: 18,484,962.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729,195.65 : 28,615,462.52 = 13,390,606.43 : x
  2. Step 2: Convert to fraction form
    20,729,195.65/28,615,462.52 = 13,390,606.43/x
  3. Step 3: Cross multiply
    20,729,195.65x = 28,615,462.52 × 13,390,606.43
  4. Step 4: Simplify right side
    20,729,195.65x = 383,178,396,315,013.69
  5. Step 5: Solve for x
    x = 383,178,396,315,013.69/20,729,195.65
  6. Step 6: Final answer
    x = 18,484,962.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.