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Finding the Fourth Proportional to 15,191.98, 20,964.98 and 8,477.89

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Solution

The fourth proportional to 15,191.98, 20,964.98 and 8,477.89 is: 11,699.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.98 : 20,964.98 = 8,477.89 : x
  2. Step 2: Convert to fraction form
    15,191.98/20,964.98 = 8,477.89/x
  3. Step 3: Cross multiply
    15,191.98x = 20,964.98 × 8,477.89
  4. Step 4: Simplify right side
    15,191.98x = 177,738,794.29
  5. Step 5: Solve for x
    x = 177,738,794.29/15,191.98
  6. Step 6: Final answer
    x = 11,699.51

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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.