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Finding the Fourth Proportional to 19,907.40, 27,472.68 and 10,955.40

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Solution

The fourth proportional to 19,907.40, 27,472.68 and 10,955.40 is: 15,118.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,907.40 : 27,472.68 = 10,955.40 : x
  2. Step 2: Convert to fraction form
    19,907.40/27,472.68 = 10,955.40/x
  3. Step 3: Cross multiply
    19,907.40x = 27,472.68 × 10,955.40
  4. Step 4: Simplify right side
    19,907.40x = 300,974,198.47
  5. Step 5: Solve for x
    x = 300,974,198.47/19,907.40
  6. Step 6: Final answer
    x = 15,118.71

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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.