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Finding the Fourth Proportional to 13,519.74, 20,278.01 and 4,159.74

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Solution

The fourth proportional to 13,519.74, 20,278.01 and 4,159.74 is: 6,239.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,519.74 : 20,278.01 = 4,159.74 : x
  2. Step 2: Convert to fraction form
    13,519.74/20,278.01 = 4,159.74/x
  3. Step 3: Cross multiply
    13,519.74x = 20,278.01 × 4,159.74
  4. Step 4: Simplify right side
    13,519.74x = 84,351,127.13
  5. Step 5: Solve for x
    x = 84,351,127.13/13,519.74
  6. Step 6: Final answer
    x = 6,239.11

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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.