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Finding the Fourth Proportional to 18,778.10, 25,916.63 and 10,711.71

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Solution

The fourth proportional to 18,778.10, 25,916.63 and 10,711.71 is: 14,783.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,778.10 : 25,916.63 = 10,711.71 : x
  2. Step 2: Convert to fraction form
    18,778.10/25,916.63 = 10,711.71/x
  3. Step 3: Cross multiply
    18,778.10x = 25,916.63 × 10,711.71
  4. Step 4: Simplify right side
    18,778.10x = 277,611,371.18
  5. Step 5: Solve for x
    x = 277,611,371.18/18,778.10
  6. Step 6: Final answer
    x = 14,783.79

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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.