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Finding the Fourth Proportional to 15,090.53, 20,824.97 and 8,376.15

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Solution

The fourth proportional to 15,090.53, 20,824.97 and 8,376.15 is: 11,559.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.53 : 20,824.97 = 8,376.15 : x
  2. Step 2: Convert to fraction form
    15,090.53/20,824.97 = 8,376.15/x
  3. Step 3: Cross multiply
    15,090.53x = 20,824.97 × 8,376.15
  4. Step 4: Simplify right side
    15,090.53x = 174,433,030.58
  5. Step 5: Solve for x
    x = 174,433,030.58/15,090.53
  6. Step 6: Final answer
    x = 11,559.11

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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.