Home / 21,089.80-29,102.78-11,657.75

Finding the Fourth Proportional to 21,089.80, 29,102.78 and 11,657.75

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Solution

The fourth proportional to 21,089.80, 29,102.78 and 11,657.75 is: 16,087.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,089.80 : 29,102.78 = 11,657.75 : x
  2. Step 2: Convert to fraction form
    21,089.80/29,102.78 = 11,657.75/x
  3. Step 3: Cross multiply
    21,089.80x = 29,102.78 × 11,657.75
  4. Step 4: Simplify right side
    21,089.80x = 339,272,875.26
  5. Step 5: Solve for x
    x = 339,272,875.26/21,089.80
  6. Step 6: Final answer
    x = 16,087.06

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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.