Home / 21,154.92-29,191.38-11,721.08

Finding the Fourth Proportional to 21,154.92, 29,191.38 and 11,721.08

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Solution

The fourth proportional to 21,154.92, 29,191.38 and 11,721.08 is: 16,173.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,154.92 : 29,191.38 = 11,721.08 : x
  2. Step 2: Convert to fraction form
    21,154.92/29,191.38 = 11,721.08/x
  3. Step 3: Cross multiply
    21,154.92x = 29,191.38 × 11,721.08
  4. Step 4: Simplify right side
    21,154.92x = 342,154,500.29
  5. Step 5: Solve for x
    x = 342,154,500.29/21,154.92
  6. Step 6: Final answer
    x = 16,173.76

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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.