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Finding the Fourth Proportional to 18,911.76, 26,097.12 and 10,953.42

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Solution

The fourth proportional to 18,911.76, 26,097.12 and 10,953.42 is: 15,115.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.76 : 26,097.12 = 10,953.42 : x
  2. Step 2: Convert to fraction form
    18,911.76/26,097.12 = 10,953.42/x
  3. Step 3: Cross multiply
    18,911.76x = 26,097.12 × 10,953.42
  4. Step 4: Simplify right side
    18,911.76x = 285,852,716.15
  5. Step 5: Solve for x
    x = 285,852,716.15/18,911.76
  6. Step 6: Final answer
    x = 15,115.08

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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.