Home / 13,144.40-18,139.33-7,176.20

Finding the Fourth Proportional to 13,144.40, 18,139.33 and 7,176.20

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Solution

The fourth proportional to 13,144.40, 18,139.33 and 7,176.20 is: 9,903.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,144.40 : 18,139.33 = 7,176.20 : x
  2. Step 2: Convert to fraction form
    13,144.40/18,139.33 = 7,176.20/x
  3. Step 3: Cross multiply
    13,144.40x = 18,139.33 × 7,176.20
  4. Step 4: Simplify right side
    13,144.40x = 130,171,500.81
  5. Step 5: Solve for x
    x = 130,171,500.81/13,144.40
  6. Step 6: Final answer
    x = 9,903.19

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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.