Home / 21,178.79-29,230.23-11,750.39

Finding the Fourth Proportional to 21,178.79, 29,230.23 and 11,750.39

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Solution

The fourth proportional to 21,178.79, 29,230.23 and 11,750.39 is: 16,217.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.79 : 29,230.23 = 11,750.39 : x
  2. Step 2: Convert to fraction form
    21,178.79/29,230.23 = 11,750.39/x
  3. Step 3: Cross multiply
    21,178.79x = 29,230.23 × 11,750.39
  4. Step 4: Simplify right side
    21,178.79x = 343,466,456.14
  5. Step 5: Solve for x
    x = 343,466,456.14/21,178.79
  6. Step 6: Final answer
    x = 16,217.48

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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.