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Finding the Fourth Proportional to 18,800.68, 25,979.16 and 17,889.70

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Solution

The fourth proportional to 18,800.68, 25,979.16 and 17,889.70 is: 24,720.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,800.68 : 25,979.16 = 17,889.70 : x
  2. Step 2: Convert to fraction form
    18,800.68/25,979.16 = 17,889.70/x
  3. Step 3: Cross multiply
    18,800.68x = 25,979.16 × 17,889.70
  4. Step 4: Simplify right side
    18,800.68x = 464,759,378.65
  5. Step 5: Solve for x
    x = 464,759,378.65/18,800.68
  6. Step 6: Final answer
    x = 24,720.35

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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.