Home / 21,153.12-29,189.70-11,721.48

Finding the Fourth Proportional to 21,153.12, 29,189.70 and 11,721.48

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Solution

The fourth proportional to 21,153.12, 29,189.70 and 11,721.48 is: 16,174.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.12 : 29,189.70 = 11,721.48 : x
  2. Step 2: Convert to fraction form
    21,153.12/29,189.70 = 11,721.48/x
  3. Step 3: Cross multiply
    21,153.12x = 29,189.70 × 11,721.48
  4. Step 4: Simplify right side
    21,153.12x = 342,146,484.76
  5. Step 5: Solve for x
    x = 342,146,484.76/21,153.12
  6. Step 6: Final answer
    x = 16,174.75

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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.