Home / 13,778.42-20,667.45-3,390.26

Finding the Fourth Proportional to 13,778.42, 20,667.45 and 3,390.26

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Solution

The fourth proportional to 13,778.42, 20,667.45 and 3,390.26 is: 5,085.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.42 : 20,667.45 = 3,390.26 : x
  2. Step 2: Convert to fraction form
    13,778.42/20,667.45 = 3,390.26/x
  3. Step 3: Cross multiply
    13,778.42x = 20,667.45 × 3,390.26
  4. Step 4: Simplify right side
    13,778.42x = 70,068,029.04
  5. Step 5: Solve for x
    x = 70,068,029.04/13,778.42
  6. Step 6: Final answer
    x = 5,085.35

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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.