Home / 22,711.31-31,341.36-12,639.56

Finding the Fourth Proportional to 22,711.31, 31,341.36 and 12,639.56

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Solution

The fourth proportional to 22,711.31, 31,341.36 and 12,639.56 is: 17,442.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,711.31 : 31,341.36 = 12,639.56 : x
  2. Step 2: Convert to fraction form
    22,711.31/31,341.36 = 12,639.56/x
  3. Step 3: Cross multiply
    22,711.31x = 31,341.36 × 12,639.56
  4. Step 4: Simplify right side
    22,711.31x = 396,141,078.56
  5. Step 5: Solve for x
    x = 396,141,078.56/22,711.31
  6. Step 6: Final answer
    x = 17,442.46

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1.5x scale

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.