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Finding the Fourth Proportional to 12,249, 18,317.43 and 9,131.13

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Solution

The fourth proportional to 12,249, 18,317.43 and 9,131.13 is: 13,654.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,249 : 18,317.43 = 9,131.13 : x
  2. Step 2: Convert to fraction form
    12,249/18,317.43 = 9,131.13/x
  3. Step 3: Cross multiply
    12,249x = 18,317.43 × 9,131.13
  4. Step 4: Simplify right side
    12,249x = 167,258,834.60
  5. Step 5: Solve for x
    x = 167,258,834.60/12,249
  6. Step 6: Final answer
    x = 13,654.90

Related Problems

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Half scale
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Double scale
Find fourth proportional to 12,250, 18,318.93 and 9,132.13
Similar ratio
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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.