Home / 21,510-29,687.04-13,131.36

Finding the Fourth Proportional to 21,510, 29,687.04 and 13,131.36

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Solution

The fourth proportional to 21,510, 29,687.04 and 13,131.36 is: 18,123.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,510 : 29,687.04 = 13,131.36 : x
  2. Step 2: Convert to fraction form
    21,510/29,687.04 = 13,131.36/x
  3. Step 3: Cross multiply
    21,510x = 29,687.04 × 13,131.36
  4. Step 4: Simplify right side
    21,510x = 389,831,209.57
  5. Step 5: Solve for x
    x = 389,831,209.57/21,510
  6. Step 6: Final answer
    x = 18,123.25

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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.