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Finding the Fourth Proportional to 22,376.94, 30,872.79 and 12,938.82

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Solution

The fourth proportional to 22,376.94, 30,872.79 and 12,938.82 is: 17,851.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,376.94 : 30,872.79 = 12,938.82 : x
  2. Step 2: Convert to fraction form
    22,376.94/30,872.79 = 12,938.82/x
  3. Step 3: Cross multiply
    22,376.94x = 30,872.79 × 12,938.82
  4. Step 4: Simplify right side
    22,376.94x = 399,457,472.71
  5. Step 5: Solve for x
    x = 399,457,472.71/22,376.94
  6. Step 6: Final answer
    x = 17,851.30

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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.