Home / 21,153.24-29,191.10-11,721.60

Finding the Fourth Proportional to 21,153.24, 29,191.10 and 11,721.60

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Solution

The fourth proportional to 21,153.24, 29,191.10 and 11,721.60 is: 16,175.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.24 : 29,191.10 = 11,721.60 : x
  2. Step 2: Convert to fraction form
    21,153.24/29,191.10 = 11,721.60/x
  3. Step 3: Cross multiply
    21,153.24x = 29,191.10 × 11,721.60
  4. Step 4: Simplify right side
    21,153.24x = 342,166,339.15
  5. Step 5: Solve for x
    x = 342,166,339.15/21,153.24
  6. Step 6: Final answer
    x = 16,175.60

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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.