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Finding the Fourth Proportional to 13,919.20, 20,879.84 and 4,058.56

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Solution

The fourth proportional to 13,919.20, 20,879.84 and 4,058.56 is: 6,088.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.20 : 20,879.84 = 4,058.56 : x
  2. Step 2: Convert to fraction form
    13,919.20/20,879.84 = 4,058.56/x
  3. Step 3: Cross multiply
    13,919.20x = 20,879.84 × 4,058.56
  4. Step 4: Simplify right side
    13,919.20x = 84,742,083.43
  5. Step 5: Solve for x
    x = 84,742,083.43/13,919.20
  6. Step 6: Final answer
    x = 6,088.14

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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.