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Finding the Fourth Proportional to 18,997.65, 26,211.40 and 10,930.87

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Solution

The fourth proportional to 18,997.65, 26,211.40 and 10,930.87 is: 15,081.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,997.65 : 26,211.40 = 10,930.87 : x
  2. Step 2: Convert to fraction form
    18,997.65/26,211.40 = 10,930.87/x
  3. Step 3: Cross multiply
    18,997.65x = 26,211.40 × 10,930.87
  4. Step 4: Simplify right side
    18,997.65x = 286,513,405.92
  5. Step 5: Solve for x
    x = 286,513,405.92/18,997.65
  6. Step 6: Final answer
    x = 15,081.52

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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.