Home / 18,831.39-28,236.01-7,145.43

Finding the Fourth Proportional to 18,831.39, 28,236.01 and 7,145.43

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Solution

The fourth proportional to 18,831.39, 28,236.01 and 7,145.43 is: 10,713.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.39 : 28,236.01 = 7,145.43 : x
  2. Step 2: Convert to fraction form
    18,831.39/28,236.01 = 7,145.43/x
  3. Step 3: Cross multiply
    18,831.39x = 28,236.01 × 7,145.43
  4. Step 4: Simplify right side
    18,831.39x = 201,758,432.93
  5. Step 5: Solve for x
    x = 201,758,432.93/18,831.39
  6. Step 6: Final answer
    x = 10,713.94

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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.