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Finding the Fourth Proportional to 18,685, 25,787.12 and 10,301.50

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Solution

The fourth proportional to 18,685, 25,787.12 and 10,301.50 is: 14,217.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685 : 25,787.12 = 10,301.50 : x
  2. Step 2: Convert to fraction form
    18,685/25,787.12 = 10,301.50/x
  3. Step 3: Cross multiply
    18,685x = 25,787.12 × 10,301.50
  4. Step 4: Simplify right side
    18,685x = 265,646,016.68
  5. Step 5: Solve for x
    x = 265,646,016.68/18,685
  6. Step 6: Final answer
    x = 14,217.07

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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.