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Finding the Fourth Proportional to 15,079.11, 20,808.21 and 8,364.36

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Solution

The fourth proportional to 15,079.11, 20,808.21 and 8,364.36 is: 11,542.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,079.11 : 20,808.21 = 8,364.36 : x
  2. Step 2: Convert to fraction form
    15,079.11/20,808.21 = 8,364.36/x
  3. Step 3: Cross multiply
    15,079.11x = 20,808.21 × 8,364.36
  4. Step 4: Simplify right side
    15,079.11x = 174,047,359.40
  5. Step 5: Solve for x
    x = 174,047,359.40/15,079.11
  6. Step 6: Final answer
    x = 11,542.28

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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.