Home / 21,090.70-29,103.14-11,657.74

Finding the Fourth Proportional to 21,090.70, 29,103.14 and 11,657.74

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Solution

The fourth proportional to 21,090.70, 29,103.14 and 11,657.74 is: 16,086.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.70 : 29,103.14 = 11,657.74 : x
  2. Step 2: Convert to fraction form
    21,090.70/29,103.14 = 11,657.74/x
  3. Step 3: Cross multiply
    21,090.70x = 29,103.14 × 11,657.74
  4. Step 4: Simplify right side
    21,090.70x = 339,276,839.30
  5. Step 5: Solve for x
    x = 339,276,839.30/21,090.70
  6. Step 6: Final answer
    x = 16,086.56

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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.