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Finding the Fourth Proportional to 13,598.99, 20,398.67 and 5,279.48

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Solution

The fourth proportional to 13,598.99, 20,398.67 and 5,279.48 is: 7,919.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,598.99 : 20,398.67 = 5,279.48 : x
  2. Step 2: Convert to fraction form
    13,598.99/20,398.67 = 5,279.48/x
  3. Step 3: Cross multiply
    13,598.99x = 20,398.67 × 5,279.48
  4. Step 4: Simplify right side
    13,598.99x = 107,694,343.89
  5. Step 5: Solve for x
    x = 107,694,343.89/13,598.99
  6. Step 6: Final answer
    x = 7,919.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.