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Finding the Fourth Proportional to 15,754.72, 21,721.80 and 10,080.16

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Solution

The fourth proportional to 15,754.72, 21,721.80 and 10,080.16 is: 13,898.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,754.72 : 21,721.80 = 10,080.16 : x
  2. Step 2: Convert to fraction form
    15,754.72/21,721.80 = 10,080.16/x
  3. Step 3: Cross multiply
    15,754.72x = 21,721.80 × 10,080.16
  4. Step 4: Simplify right side
    15,754.72x = 218,959,219.49
  5. Step 5: Solve for x
    x = 218,959,219.49/15,754.72
  6. Step 6: Final answer
    x = 13,898.01

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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.