Home / 21,545.09-29,735.00-12,115.47

Finding the Fourth Proportional to 21,545.09, 29,735.00 and 12,115.47

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Solution

The fourth proportional to 21,545.09, 29,735.00 and 12,115.47 is: 16,720.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,545.09 : 29,735.00 = 12,115.47 : x
  2. Step 2: Convert to fraction form
    21,545.09/29,735.00 = 12,115.47/x
  3. Step 3: Cross multiply
    21,545.09x = 29,735.00 × 12,115.47
  4. Step 4: Simplify right side
    21,545.09x = 360,253,439.87
  5. Step 5: Solve for x
    x = 360,253,439.87/21,545.09
  6. Step 6: Final answer
    x = 16,720.91

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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.