Home / 13,143.92-18,137.52-7,477.16

Finding the Fourth Proportional to 13,143.92, 18,137.52 and 7,477.16

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Solution

The fourth proportional to 13,143.92, 18,137.52 and 7,477.16 is: 10,317.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.92 : 18,137.52 = 7,477.16 : x
  2. Step 2: Convert to fraction form
    13,143.92/18,137.52 = 7,477.16/x
  3. Step 3: Cross multiply
    13,143.92x = 18,137.52 × 7,477.16
  4. Step 4: Simplify right side
    13,143.92x = 135,617,139.04
  5. Step 5: Solve for x
    x = 135,617,139.04/13,143.92
  6. Step 6: Final answer
    x = 10,317.86

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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.