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Finding the Fourth Proportional to 19,361.32, 26,719.14 and 10,979.08

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Solution

The fourth proportional to 19,361.32, 26,719.14 and 10,979.08 is: 15,151.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,361.32 : 26,719.14 = 10,979.08 : x
  2. Step 2: Convert to fraction form
    19,361.32/26,719.14 = 10,979.08/x
  3. Step 3: Cross multiply
    19,361.32x = 26,719.14 × 10,979.08
  4. Step 4: Simplify right side
    19,361.32x = 293,351,575.59
  5. Step 5: Solve for x
    x = 293,351,575.59/19,361.32
  6. Step 6: Final answer
    x = 15,151.42

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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.