Home / 21,408.84-29,545.56-11,980.44

Finding the Fourth Proportional to 21,408.84, 29,545.56 and 11,980.44

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Solution

The fourth proportional to 21,408.84, 29,545.56 and 11,980.44 is: 16,533.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.84 : 29,545.56 = 11,980.44 : x
  2. Step 2: Convert to fraction form
    21,408.84/29,545.56 = 11,980.44/x
  3. Step 3: Cross multiply
    21,408.84x = 29,545.56 × 11,980.44
  4. Step 4: Simplify right side
    21,408.84x = 353,968,808.85
  5. Step 5: Solve for x
    x = 353,968,808.85/21,408.84
  6. Step 6: Final answer
    x = 16,533.77

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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.