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Finding the Fourth Proportional to 15,191.72, 20,964.26 and 8,477.80

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Solution

The fourth proportional to 15,191.72, 20,964.26 and 8,477.80 is: 11,699.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.72 : 20,964.26 = 8,477.80 : x
  2. Step 2: Convert to fraction form
    15,191.72/20,964.26 = 8,477.80/x
  3. Step 3: Cross multiply
    15,191.72x = 20,964.26 × 8,477.80
  4. Step 4: Simplify right side
    15,191.72x = 177,730,803.43
  5. Step 5: Solve for x
    x = 177,730,803.43/15,191.72
  6. Step 6: Final answer
    x = 11,699.19

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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.