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Finding the Fourth Proportional to 15,759.99, 21,741.15 and 10,090.20

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Solution

The fourth proportional to 15,759.99, 21,741.15 and 10,090.20 is: 13,919.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,759.99 : 21,741.15 = 10,090.20 : x
  2. Step 2: Convert to fraction form
    15,759.99/21,741.15 = 10,090.20/x
  3. Step 3: Cross multiply
    15,759.99x = 21,741.15 × 10,090.20
  4. Step 4: Simplify right side
    15,759.99x = 219,372,551.73
  5. Step 5: Solve for x
    x = 219,372,551.73/15,759.99
  6. Step 6: Final answer
    x = 13,919.59

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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.