Home / 13,145.68-18,130.80-7,839.37

Finding the Fourth Proportional to 13,145.68, 18,130.80 and 7,839.37

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Solution

The fourth proportional to 13,145.68, 18,130.80 and 7,839.37 is: 10,812.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.68 : 18,130.80 = 7,839.37 : x
  2. Step 2: Convert to fraction form
    13,145.68/18,130.80 = 7,839.37/x
  3. Step 3: Cross multiply
    13,145.68x = 18,130.80 × 7,839.37
  4. Step 4: Simplify right side
    13,145.68x = 142,134,049.60
  5. Step 5: Solve for x
    x = 142,134,049.60/13,145.68
  6. Step 6: Final answer
    x = 10,812.22

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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.