Home / 15,717.06-21,688.62-8,643.48

Finding the Fourth Proportional to 15,717.06, 21,688.62 and 8,643.48

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Solution

The fourth proportional to 15,717.06, 21,688.62 and 8,643.48 is: 11,927.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.06 : 21,688.62 = 8,643.48 : x
  2. Step 2: Convert to fraction form
    15,717.06/21,688.62 = 8,643.48/x
  3. Step 3: Cross multiply
    15,717.06x = 21,688.62 × 8,643.48
  4. Step 4: Simplify right side
    15,717.06x = 187,465,153.20
  5. Step 5: Solve for x
    x = 187,465,153.20/15,717.06
  6. Step 6: Final answer
    x = 11,927.49

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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.