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Finding the Fourth Proportional to 15,197.52, 20,969.12 and 9,145.12

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Solution

The fourth proportional to 15,197.52, 20,969.12 and 9,145.12 is: 12,618.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,197.52 : 20,969.12 = 9,145.12 : x
  2. Step 2: Convert to fraction form
    15,197.52/20,969.12 = 9,145.12/x
  3. Step 3: Cross multiply
    15,197.52x = 20,969.12 × 9,145.12
  4. Step 4: Simplify right side
    15,197.52x = 191,765,118.69
  5. Step 5: Solve for x
    x = 191,765,118.69/15,197.52
  6. Step 6: Final answer
    x = 12,618.18

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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.