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Finding the Fourth Proportional to 22,875.44, 31,568.28 and 12,939.44

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Solution

The fourth proportional to 22,875.44, 31,568.28 and 12,939.44 is: 17,856.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,875.44 : 31,568.28 = 12,939.44 : x
  2. Step 2: Convert to fraction form
    22,875.44/31,568.28 = 12,939.44/x
  3. Step 3: Cross multiply
    22,875.44x = 31,568.28 × 12,939.44
  4. Step 4: Simplify right side
    22,875.44x = 408,475,864.96
  5. Step 5: Solve for x
    x = 408,475,864.96/22,875.44
  6. Step 6: Final answer
    x = 17,856.52

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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.