Home / 13,143.77-18,136.80-7,479.23

Finding the Fourth Proportional to 13,143.77, 18,136.80 and 7,479.23

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Solution

The fourth proportional to 13,143.77, 18,136.80 and 7,479.23 is: 10,320.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.77 : 18,136.80 = 7,479.23 : x
  2. Step 2: Convert to fraction form
    13,143.77/18,136.80 = 7,479.23/x
  3. Step 3: Cross multiply
    13,143.77x = 18,136.80 × 7,479.23
  4. Step 4: Simplify right side
    13,143.77x = 135,649,344.01
  5. Step 5: Solve for x
    x = 135,649,344.01/13,143.77
  6. Step 6: Final answer
    x = 10,320.43

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Half 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.