Home / 21,938.89-32,908.31-7,147.79

Finding the Fourth Proportional to 21,938.89, 32,908.31 and 7,147.79

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Solution

The fourth proportional to 21,938.89, 32,908.31 and 7,147.79 is: 10,721.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,938.89 : 32,908.31 = 7,147.79 : x
  2. Step 2: Convert to fraction form
    21,938.89/32,908.31 = 7,147.79/x
  3. Step 3: Cross multiply
    21,938.89x = 32,908.31 × 7,147.79
  4. Step 4: Simplify right side
    21,938.89x = 235,221,689.13
  5. Step 5: Solve for x
    x = 235,221,689.13/21,938.89
  6. Step 6: Final answer
    x = 10,721.68

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1.5x scale

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.