Home / 13,143.87-18,130.23-9,163.53

Finding the Fourth Proportional to 13,143.87, 18,130.23 and 9,163.53

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Solution

The fourth proportional to 13,143.87, 18,130.23 and 9,163.53 is: 12,639.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.87 : 18,130.23 = 9,163.53 : x
  2. Step 2: Convert to fraction form
    13,143.87/18,130.23 = 9,163.53/x
  3. Step 3: Cross multiply
    13,143.87x = 18,130.23 × 9,163.53
  4. Step 4: Simplify right side
    13,143.87x = 166,136,906.51
  5. Step 5: Solve for x
    x = 166,136,906.51/13,143.87
  6. Step 6: Final answer
    x = 12,639.88

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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.