Home / 13,667.19-18,853.89-9,191.13

Finding the Fourth Proportional to 13,667.19, 18,853.89 and 9,191.13

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Solution

The fourth proportional to 13,667.19, 18,853.89 and 9,191.13 is: 12,679.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,667.19 : 18,853.89 = 9,191.13 : x
  2. Step 2: Convert to fraction form
    13,667.19/18,853.89 = 9,191.13/x
  3. Step 3: Cross multiply
    13,667.19x = 18,853.89 × 9,191.13
  4. Step 4: Simplify right side
    13,667.19x = 173,288,554.00
  5. Step 5: Solve for x
    x = 173,288,554.00/13,667.19
  6. Step 6: Final answer
    x = 12,679.16

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Half scale
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Double scale
Find fourth proportional to 13,668.19, 18,855.27 and 9,192.13
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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.