Home / 13,140.28-18,132.88-7,474.28

Finding the Fourth Proportional to 13,140.28, 18,132.88 and 7,474.28

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Solution

The fourth proportional to 13,140.28, 18,132.88 and 7,474.28 is: 10,314.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.28 : 18,132.88 = 7,474.28 : x
  2. Step 2: Convert to fraction form
    13,140.28/18,132.88 = 7,474.28/x
  3. Step 3: Cross multiply
    13,140.28x = 18,132.88 × 7,474.28
  4. Step 4: Simplify right side
    13,140.28x = 135,530,222.33
  5. Step 5: Solve for x
    x = 135,530,222.33/13,140.28
  6. Step 6: Final answer
    x = 10,314.10

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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.