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Finding the Fourth Proportional to 18,900.79, 26,081.39 and 10,943.55

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Solution

The fourth proportional to 18,900.79, 26,081.39 and 10,943.55 is: 15,101.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,900.79 : 26,081.39 = 10,943.55 : x
  2. Step 2: Convert to fraction form
    18,900.79/26,081.39 = 10,943.55/x
  3. Step 3: Cross multiply
    18,900.79x = 26,081.39 × 10,943.55
  4. Step 4: Simplify right side
    18,900.79x = 285,423,022.89
  5. Step 5: Solve for x
    x = 285,423,022.89/18,900.79
  6. Step 6: Final answer
    x = 15,101.12

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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.