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Finding the Fourth Proportional to 15,090.95, 20,825.12 and 8,376.38

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Solution

The fourth proportional to 15,090.95, 20,825.12 and 8,376.38 is: 11,559.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.95 : 20,825.12 = 8,376.38 : x
  2. Step 2: Convert to fraction form
    15,090.95/20,825.12 = 8,376.38/x
  3. Step 3: Cross multiply
    15,090.95x = 20,825.12 × 8,376.38
  4. Step 4: Simplify right side
    15,090.95x = 174,438,972.66
  5. Step 5: Solve for x
    x = 174,438,972.66/15,090.95
  6. Step 6: Final answer
    x = 11,559.18

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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.