Home / 13,143.23-18,136.89-7,477.19

Finding the Fourth Proportional to 13,143.23, 18,136.89 and 7,477.19

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Solution

The fourth proportional to 13,143.23, 18,136.89 and 7,477.19 is: 10,318.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.23 : 18,136.89 = 7,477.19 : x
  2. Step 2: Convert to fraction form
    13,143.23/18,136.89 = 7,477.19/x
  3. Step 3: Cross multiply
    13,143.23x = 18,136.89 × 7,477.19
  4. Step 4: Simplify right side
    13,143.23x = 135,612,972.54
  5. Step 5: Solve for x
    x = 135,612,972.54/13,143.23
  6. Step 6: Final answer
    x = 10,318.09

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Half scale
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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.