Home / 13,678.11-20,520.36-4,319.07

Finding the Fourth Proportional to 13,678.11, 20,520.36 and 4,319.07

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Solution

The fourth proportional to 13,678.11, 20,520.36 and 4,319.07 is: 6,479.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.11 : 20,520.36 = 4,319.07 : x
  2. Step 2: Convert to fraction form
    13,678.11/20,520.36 = 4,319.07/x
  3. Step 3: Cross multiply
    13,678.11x = 20,520.36 × 4,319.07
  4. Step 4: Simplify right side
    13,678.11x = 88,628,871.27
  5. Step 5: Solve for x
    x = 88,628,871.27/13,678.11
  6. Step 6: Final answer
    x = 6,479.61

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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.