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Finding the Fourth Proportional to 15,090.48, 20,822.95 and 8,375.17

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Solution

The fourth proportional to 15,090.48, 20,822.95 and 8,375.17 is: 11,556.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.48 : 20,822.95 = 8,375.17 : x
  2. Step 2: Convert to fraction form
    15,090.48/20,822.95 = 8,375.17/x
  3. Step 3: Cross multiply
    15,090.48x = 20,822.95 × 8,375.17
  4. Step 4: Simplify right side
    15,090.48x = 174,395,746.15
  5. Step 5: Solve for x
    x = 174,395,746.15/15,090.48
  6. Step 6: Final answer
    x = 11,556.67

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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.