Home / 21,152.72-29,191.24-11,721.68

Finding the Fourth Proportional to 21,152.72, 29,191.24 and 11,721.68

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Solution

The fourth proportional to 21,152.72, 29,191.24 and 11,721.68 is: 16,176.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152.72 : 29,191.24 = 11,721.68 : x
  2. Step 2: Convert to fraction form
    21,152.72/29,191.24 = 11,721.68/x
  3. Step 3: Cross multiply
    21,152.72x = 29,191.24 × 11,721.68
  4. Step 4: Simplify right side
    21,152.72x = 342,170,374.08
  5. Step 5: Solve for x
    x = 342,170,374.08/21,152.72
  6. Step 6: Final answer
    x = 16,176.19

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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.