Home / 21,107.78-31,665.75-6,315.42

Finding the Fourth Proportional to 21,107.78, 31,665.75 and 6,315.42

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Solution

The fourth proportional to 21,107.78, 31,665.75 and 6,315.42 is: 9,474.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.78 : 31,665.75 = 6,315.42 : x
  2. Step 2: Convert to fraction form
    21,107.78/31,665.75 = 6,315.42/x
  3. Step 3: Cross multiply
    21,107.78x = 31,665.75 × 6,315.42
  4. Step 4: Simplify right side
    21,107.78x = 199,982,510.87
  5. Step 5: Solve for x
    x = 199,982,510.87/21,107.78
  6. Step 6: Final answer
    x = 9,474.35

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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.