Home / 21,111.42-29,121.06-13,941.40

Finding the Fourth Proportional to 21,111.42, 29,121.06 and 13,941.40

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Solution

The fourth proportional to 21,111.42, 29,121.06 and 13,941.40 is: 19,230.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111.42 : 29,121.06 = 13,941.40 : x
  2. Step 2: Convert to fraction form
    21,111.42/29,121.06 = 13,941.40/x
  3. Step 3: Cross multiply
    21,111.42x = 29,121.06 × 13,941.40
  4. Step 4: Simplify right side
    21,111.42x = 405,988,325.36
  5. Step 5: Solve for x
    x = 405,988,325.36/21,111.42
  6. Step 6: Final answer
    x = 19,230.75

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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.