Home / 21,146.48-29,135.14-13,963.60

Finding the Fourth Proportional to 21,146.48, 29,135.14 and 13,963.60

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Solution

The fourth proportional to 21,146.48, 29,135.14 and 13,963.60 is: 19,238.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,146.48 : 29,135.14 = 13,963.60 : x
  2. Step 2: Convert to fraction form
    21,146.48/29,135.14 = 13,963.60/x
  3. Step 3: Cross multiply
    21,146.48x = 29,135.14 × 13,963.60
  4. Step 4: Simplify right side
    21,146.48x = 406,831,440.90
  5. Step 5: Solve for x
    x = 406,831,440.90/21,146.48
  6. Step 6: Final answer
    x = 19,238.73

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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.