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Finding the Fourth Proportional to 22,689.54, 31,311.90 and 12,619.08

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Solution

The fourth proportional to 22,689.54, 31,311.90 and 12,619.08 is: 17,414.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,689.54 : 31,311.90 = 12,619.08 : x
  2. Step 2: Convert to fraction form
    22,689.54/31,311.90 = 12,619.08/x
  3. Step 3: Cross multiply
    22,689.54x = 31,311.90 × 12,619.08
  4. Step 4: Simplify right side
    22,689.54x = 395,127,371.05
  5. Step 5: Solve for x
    x = 395,127,371.05/22,689.54
  6. Step 6: Final answer
    x = 17,414.52

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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.