Home / 21,153.16-29,192.16-11,721.64

Finding the Fourth Proportional to 21,153.16, 29,192.16 and 11,721.64

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Solution

The fourth proportional to 21,153.16, 29,192.16 and 11,721.64 is: 16,176.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.16 : 29,192.16 = 11,721.64 : x
  2. Step 2: Convert to fraction form
    21,153.16/29,192.16 = 11,721.64/x
  3. Step 3: Cross multiply
    21,153.16x = 29,192.16 × 11,721.64
  4. Step 4: Simplify right side
    21,153.16x = 342,179,990.34
  5. Step 5: Solve for x
    x = 342,179,990.34/21,153.16
  6. Step 6: Final answer
    x = 16,176.31

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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.