Home / 13,155.35-18,154.38-7,489.81

Finding the Fourth Proportional to 13,155.35, 18,154.38 and 7,489.81

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Solution

The fourth proportional to 13,155.35, 18,154.38 and 7,489.81 is: 10,335.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.35 : 18,154.38 = 7,489.81 : x
  2. Step 2: Convert to fraction form
    13,155.35/18,154.38 = 7,489.81/x
  3. Step 3: Cross multiply
    13,155.35x = 18,154.38 × 7,489.81
  4. Step 4: Simplify right side
    13,155.35x = 135,972,811.48
  5. Step 5: Solve for x
    x = 135,972,811.48/13,155.35
  6. Step 6: Final answer
    x = 10,335.93

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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.