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Finding the Fourth Proportional to 15,199.34, 20,975.31 and 8,911.82

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Solution

The fourth proportional to 15,199.34, 20,975.31 and 8,911.82 is: 12,298.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,199.34 : 20,975.31 = 8,911.82 : x
  2. Step 2: Convert to fraction form
    15,199.34/20,975.31 = 8,911.82/x
  3. Step 3: Cross multiply
    15,199.34x = 20,975.31 × 8,911.82
  4. Step 4: Simplify right side
    15,199.34x = 186,928,187.16
  5. Step 5: Solve for x
    x = 186,928,187.16/15,199.34
  6. Step 6: Final answer
    x = 12,298.44

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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.