Home / 22,911.32-31,618.80-12,839.92

Finding the Fourth Proportional to 22,911.32, 31,618.80 and 12,839.92

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Solution

The fourth proportional to 22,911.32, 31,618.80 and 12,839.92 is: 17,719.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,911.32 : 31,618.80 = 12,839.92 : x
  2. Step 2: Convert to fraction form
    22,911.32/31,618.80 = 12,839.92/x
  3. Step 3: Cross multiply
    22,911.32x = 31,618.80 × 12,839.92
  4. Step 4: Simplify right side
    22,911.32x = 405,982,862.50
  5. Step 5: Solve for x
    x = 405,982,862.50/22,911.32
  6. Step 6: Final answer
    x = 17,719.75

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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.