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Finding the Fourth Proportional to 15,090.39, 20,824.47 and 8,375.67

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Solution

The fourth proportional to 15,090.39, 20,824.47 and 8,375.67 is: 11,558.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.39 : 20,824.47 = 8,375.67 : x
  2. Step 2: Convert to fraction form
    15,090.39/20,824.47 = 8,375.67/x
  3. Step 3: Cross multiply
    15,090.39x = 20,824.47 × 8,375.67
  4. Step 4: Simplify right side
    15,090.39x = 174,418,888.64
  5. Step 5: Solve for x
    x = 174,418,888.64/15,090.39
  6. Step 6: Final answer
    x = 11,558.28

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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.