Home / 13,145.14-18,140.20-7,176.80

Finding the Fourth Proportional to 13,145.14, 18,140.20 and 7,176.80

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Solution

The fourth proportional to 13,145.14, 18,140.20 and 7,176.80 is: 9,903.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.14 : 18,140.20 = 7,176.80 : x
  2. Step 2: Convert to fraction form
    13,145.14/18,140.20 = 7,176.80/x
  3. Step 3: Cross multiply
    13,145.14x = 18,140.20 × 7,176.80
  4. Step 4: Simplify right side
    13,145.14x = 130,188,655.14
  5. Step 5: Solve for x
    x = 130,188,655.14/13,145.14
  6. Step 6: Final answer
    x = 9,903.94

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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.