Home / 13,145.32-18,140.65-7,176.61

Finding the Fourth Proportional to 13,145.32, 18,140.65 and 7,176.61

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Solution

The fourth proportional to 13,145.32, 18,140.65 and 7,176.61 is: 9,903.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.32 : 18,140.65 = 7,176.61 : x
  2. Step 2: Convert to fraction form
    13,145.32/18,140.65 = 7,176.61/x
  3. Step 3: Cross multiply
    13,145.32x = 18,140.65 × 7,176.61
  4. Step 4: Simplify right side
    13,145.32x = 130,188,320.97
  5. Step 5: Solve for x
    x = 130,188,320.97/13,145.32
  6. Step 6: Final answer
    x = 9,903.78

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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.