Home / 9,108.45-13,664.70-7,140.15

Finding the Fourth Proportional to 9,108.45, 13,664.70 and 7,140.15

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Solution

The fourth proportional to 9,108.45, 13,664.70 and 7,140.15 is: 10,711.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,108.45 : 13,664.70 = 7,140.15 : x
  2. Step 2: Convert to fraction form
    9,108.45/13,664.70 = 7,140.15/x
  3. Step 3: Cross multiply
    9,108.45x = 13,664.70 × 7,140.15
  4. Step 4: Simplify right side
    9,108.45x = 97,568,007.71
  5. Step 5: Solve for x
    x = 97,568,007.71/9,108.45
  6. Step 6: Final answer
    x = 10,711.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.