Home / 21,408.24-29,545.32-11,979.84

Finding the Fourth Proportional to 21,408.24, 29,545.32 and 11,979.84

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Solution

The fourth proportional to 21,408.24, 29,545.32 and 11,979.84 is: 16,533.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.24 : 29,545.32 = 11,979.84 : x
  2. Step 2: Convert to fraction form
    21,408.24/29,545.32 = 11,979.84/x
  3. Step 3: Cross multiply
    21,408.24x = 29,545.32 × 11,979.84
  4. Step 4: Simplify right side
    21,408.24x = 353,948,206.35
  5. Step 5: Solve for x
    x = 353,948,206.35/21,408.24
  6. Step 6: Final answer
    x = 16,533.27

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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.