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Finding the Fourth Proportional to 15,015.45, 20,719.52 and 8,300.17

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Solution

The fourth proportional to 15,015.45, 20,719.52 and 8,300.17 is: 11,453.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.45 : 20,719.52 = 8,300.17 : x
  2. Step 2: Convert to fraction form
    15,015.45/20,719.52 = 8,300.17/x
  3. Step 3: Cross multiply
    15,015.45x = 20,719.52 × 8,300.17
  4. Step 4: Simplify right side
    15,015.45x = 171,975,489.78
  5. Step 5: Solve for x
    x = 171,975,489.78/15,015.45
  6. Step 6: Final answer
    x = 11,453.23

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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.