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Finding the Fourth Proportional to 18,705.87, 27,937.51 and 16,947.36

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Solution

The fourth proportional to 18,705.87, 27,937.51 and 16,947.36 is: 25,311.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.87 : 27,937.51 = 16,947.36 : x
  2. Step 2: Convert to fraction form
    18,705.87/27,937.51 = 16,947.36/x
  3. Step 3: Cross multiply
    18,705.87x = 27,937.51 × 16,947.36
  4. Step 4: Simplify right side
    18,705.87x = 473,466,997.11
  5. Step 5: Solve for x
    x = 473,466,997.11/18,705.87
  6. Step 6: Final answer
    x = 25,311.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.