Home / 13,211.48-18,231.27-7,909.22

Finding the Fourth Proportional to 13,211.48, 18,231.27 and 7,909.22

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Solution

The fourth proportional to 13,211.48, 18,231.27 and 7,909.22 is: 10,914.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.48 : 18,231.27 = 7,909.22 : x
  2. Step 2: Convert to fraction form
    13,211.48/18,231.27 = 7,909.22/x
  3. Step 3: Cross multiply
    13,211.48x = 18,231.27 × 7,909.22
  4. Step 4: Simplify right side
    13,211.48x = 144,195,034.15
  5. Step 5: Solve for x
    x = 144,195,034.15/13,211.48
  6. Step 6: Final answer
    x = 10,914.38

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Double scale
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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.