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Finding the Fourth Proportional to 19,719.63, 29,574.99 and 5,679.63

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Solution

The fourth proportional to 19,719.63, 29,574.99 and 5,679.63 is: 8,518.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,719.63 : 29,574.99 = 5,679.63 : x
  2. Step 2: Convert to fraction form
    19,719.63/29,574.99 = 5,679.63/x
  3. Step 3: Cross multiply
    19,719.63x = 29,574.99 × 5,679.63
  4. Step 4: Simplify right side
    19,719.63x = 167,975,000.45
  5. Step 5: Solve for x
    x = 167,975,000.45/19,719.63
  6. Step 6: Final answer
    x = 8,518.16

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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.