Home / 21,418.42-29,557.53-11,986.39

Finding the Fourth Proportional to 21,418.42, 29,557.53 and 11,986.39

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Solution

The fourth proportional to 21,418.42, 29,557.53 and 11,986.39 is: 16,541.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.42 : 29,557.53 = 11,986.39 : x
  2. Step 2: Convert to fraction form
    21,418.42/29,557.53 = 11,986.39/x
  3. Step 3: Cross multiply
    21,418.42x = 29,557.53 × 11,986.39
  4. Step 4: Simplify right side
    21,418.42x = 354,288,082.02
  5. Step 5: Solve for x
    x = 354,288,082.02/21,418.42
  6. Step 6: Final answer
    x = 16,541.28

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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.