Home / 21,153.59-29,192.90-11,721.54

Finding the Fourth Proportional to 21,153.59, 29,192.90 and 11,721.54

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Solution

The fourth proportional to 21,153.59, 29,192.90 and 11,721.54 is: 16,176.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.59 : 29,192.90 = 11,721.54 : x
  2. Step 2: Convert to fraction form
    21,153.59/29,192.90 = 11,721.54/x
  3. Step 3: Cross multiply
    21,153.59x = 29,192.90 × 11,721.54
  4. Step 4: Simplify right side
    21,153.59x = 342,185,686.46
  5. Step 5: Solve for x
    x = 342,185,686.46/21,153.59
  6. Step 6: Final answer
    x = 16,176.25

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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.