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Finding the Fourth Proportional to 15,697.23, 21,662.34 and 8,623.80

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Solution

The fourth proportional to 15,697.23, 21,662.34 and 8,623.80 is: 11,900.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,697.23 : 21,662.34 = 8,623.80 : x
  2. Step 2: Convert to fraction form
    15,697.23/21,662.34 = 8,623.80/x
  3. Step 3: Cross multiply
    15,697.23x = 21,662.34 × 8,623.80
  4. Step 4: Simplify right side
    15,697.23x = 186,811,687.69
  5. Step 5: Solve for x
    x = 186,811,687.69/15,697.23
  6. Step 6: Final answer
    x = 11,900.93

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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.