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Finding the Fourth Proportional to 19,587.91, 29,381.85 and 7,107.91

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Solution

The fourth proportional to 19,587.91, 29,381.85 and 7,107.91 is: 10,661.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,587.91 : 29,381.85 = 7,107.91 : x
  2. Step 2: Convert to fraction form
    19,587.91/29,381.85 = 7,107.91/x
  3. Step 3: Cross multiply
    19,587.91x = 29,381.85 × 7,107.91
  4. Step 4: Simplify right side
    19,587.91x = 208,843,545.43
  5. Step 5: Solve for x
    x = 208,843,545.43/19,587.91
  6. Step 6: Final answer
    x = 10,661.86

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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.