Home / 13,667.19-18,860.26-8,290.25

Finding the Fourth Proportional to 13,667.19, 18,860.26 and 8,290.25

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Solution

The fourth proportional to 13,667.19, 18,860.26 and 8,290.25 is: 11,440.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,667.19 : 18,860.26 = 8,290.25 : x
  2. Step 2: Convert to fraction form
    13,667.19/18,860.26 = 8,290.25/x
  3. Step 3: Cross multiply
    13,667.19x = 18,860.26 × 8,290.25
  4. Step 4: Simplify right side
    13,667.19x = 156,356,206.73
  5. Step 5: Solve for x
    x = 156,356,206.73/13,667.19
  6. Step 6: Final answer
    x = 11,440.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.