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Finding the Fourth Proportional to 15,191.13, 20,960.40 and 8,814.03

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Solution

The fourth proportional to 15,191.13, 20,960.40 and 8,814.03 is: 12,161.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.13 : 20,960.40 = 8,814.03 : x
  2. Step 2: Convert to fraction form
    15,191.13/20,960.40 = 8,814.03/x
  3. Step 3: Cross multiply
    15,191.13x = 20,960.40 × 8,814.03
  4. Step 4: Simplify right side
    15,191.13x = 184,745,594.41
  5. Step 5: Solve for x
    x = 184,745,594.41/15,191.13
  6. Step 6: Final answer
    x = 12,161.41

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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.