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Finding the Fourth Proportional to 15,697.85, 21,662.97 and 9,328.82

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Solution

The fourth proportional to 15,697.85, 21,662.97 and 9,328.82 is: 12,873.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,697.85 : 21,662.97 = 9,328.82 : x
  2. Step 2: Convert to fraction form
    15,697.85/21,662.97 = 9,328.82/x
  3. Step 3: Cross multiply
    15,697.85x = 21,662.97 × 9,328.82
  4. Step 4: Simplify right side
    15,697.85x = 202,089,839.48
  5. Step 5: Solve for x
    x = 202,089,839.48/15,697.85
  6. Step 6: Final answer
    x = 12,873.73

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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.