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Finding the Fourth Proportional to 19,811.17, 29,687.59 and 8,707.69

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Solution

The fourth proportional to 19,811.17, 29,687.59 and 8,707.69 is: 13,048.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811.17 : 29,687.59 = 8,707.69 : x
  2. Step 2: Convert to fraction form
    19,811.17/29,687.59 = 8,707.69/x
  3. Step 3: Cross multiply
    19,811.17x = 29,687.59 × 8,707.69
  4. Step 4: Simplify right side
    19,811.17x = 258,510,160.36
  5. Step 5: Solve for x
    x = 258,510,160.36/19,811.17
  6. Step 6: Final answer
    x = 13,048.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.