Home / 21,717.15-29,970.41-12,764.53

Finding the Fourth Proportional to 21,717.15, 29,970.41 and 12,764.53

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Solution

The fourth proportional to 21,717.15, 29,970.41 and 12,764.53 is: 17,615.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,717.15 : 29,970.41 = 12,764.53 : x
  2. Step 2: Convert to fraction form
    21,717.15/29,970.41 = 12,764.53/x
  3. Step 3: Cross multiply
    21,717.15x = 29,970.41 × 12,764.53
  4. Step 4: Simplify right side
    21,717.15x = 382,558,197.56
  5. Step 5: Solve for x
    x = 382,558,197.56/21,717.15
  6. Step 6: Final answer
    x = 17,615.49

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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.