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Finding the Fourth Proportional to 19,641.97, 27,105.54 and 10,689.67

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Solution

The fourth proportional to 19,641.97, 27,105.54 and 10,689.67 is: 14,751.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,641.97 : 27,105.54 = 10,689.67 : x
  2. Step 2: Convert to fraction form
    19,641.97/27,105.54 = 10,689.67/x
  3. Step 3: Cross multiply
    19,641.97x = 27,105.54 × 10,689.67
  4. Step 4: Simplify right side
    19,641.97x = 289,749,277.77
  5. Step 5: Solve for x
    x = 289,749,277.77/19,641.97
  6. Step 6: Final answer
    x = 14,751.54

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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.