Home / 13,276.80-19,920.60-5,486.40

Finding the Fourth Proportional to 13,276.80, 19,920.60 and 5,486.40

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Solution

The fourth proportional to 13,276.80, 19,920.60 and 5,486.40 is: 8,231.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,276.80 : 19,920.60 = 5,486.40 : x
  2. Step 2: Convert to fraction form
    13,276.80/19,920.60 = 5,486.40/x
  3. Step 3: Cross multiply
    13,276.80x = 19,920.60 × 5,486.40
  4. Step 4: Simplify right side
    13,276.80x = 109,292,379.84
  5. Step 5: Solve for x
    x = 109,292,379.84/13,276.80
  6. Step 6: Final answer
    x = 8,231.83

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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.