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Finding the Fourth Proportional to 18,787.49, 28,193.54 and 7,100.71

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Solution

The fourth proportional to 18,787.49, 28,193.54 and 7,100.71 is: 10,655.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.49 : 28,193.54 = 7,100.71 : x
  2. Step 2: Convert to fraction form
    18,787.49/28,193.54 = 7,100.71/x
  3. Step 3: Cross multiply
    18,787.49x = 28,193.54 × 7,100.71
  4. Step 4: Simplify right side
    18,787.49x = 200,194,151.41
  5. Step 5: Solve for x
    x = 200,194,151.41/18,787.49
  6. Step 6: Final answer
    x = 10,655.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.