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Finding the Fourth Proportional to 15,581.03, 21,502.22 and 8,507.88

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Solution

The fourth proportional to 15,581.03, 21,502.22 and 8,507.88 is: 11,741.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,581.03 : 21,502.22 = 8,507.88 : x
  2. Step 2: Convert to fraction form
    15,581.03/21,502.22 = 8,507.88/x
  3. Step 3: Cross multiply
    15,581.03x = 21,502.22 × 8,507.88
  4. Step 4: Simplify right side
    15,581.03x = 182,938,264.95
  5. Step 5: Solve for x
    x = 182,938,264.95/15,581.03
  6. Step 6: Final answer
    x = 11,741.09

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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.