Home / 21,398.88-29,531.76-11,968.08

Finding the Fourth Proportional to 21,398.88, 29,531.76 and 11,968.08

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Solution

The fourth proportional to 21,398.88, 29,531.76 and 11,968.08 is: 16,516.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,398.88 : 29,531.76 = 11,968.08 : x
  2. Step 2: Convert to fraction form
    21,398.88/29,531.76 = 11,968.08/x
  3. Step 3: Cross multiply
    21,398.88x = 29,531.76 × 11,968.08
  4. Step 4: Simplify right side
    21,398.88x = 353,438,466.22
  5. Step 5: Solve for x
    x = 353,438,466.22/21,398.88
  6. Step 6: Final answer
    x = 16,516.68

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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.