Home / 21,087.12-29,098.80-11,654.40

Finding the Fourth Proportional to 21,087.12, 29,098.80 and 11,654.40

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Solution

The fourth proportional to 21,087.12, 29,098.80 and 11,654.40 is: 16,082.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.12 : 29,098.80 = 11,654.40 : x
  2. Step 2: Convert to fraction form
    21,087.12/29,098.80 = 11,654.40/x
  3. Step 3: Cross multiply
    21,087.12x = 29,098.80 × 11,654.40
  4. Step 4: Simplify right side
    21,087.12x = 339,129,054.72
  5. Step 5: Solve for x
    x = 339,129,054.72/21,087.12
  6. Step 6: Final answer
    x = 16,082.28

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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.