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Finding the Fourth Proportional to 19,641.84, 27,105.84 and 10,689.36

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Solution

The fourth proportional to 19,641.84, 27,105.84 and 10,689.36 is: 14,751.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,641.84 : 27,105.84 = 10,689.36 : x
  2. Step 2: Convert to fraction form
    19,641.84/27,105.84 = 10,689.36/x
  3. Step 3: Cross multiply
    19,641.84x = 27,105.84 × 10,689.36
  4. Step 4: Simplify right side
    19,641.84x = 289,744,081.86
  5. Step 5: Solve for x
    x = 289,744,081.86/19,641.84
  6. Step 6: Final answer
    x = 14,751.37

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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.