Home / 18,831.89-28,236.75-7,145.93

Finding the Fourth Proportional to 18,831.89, 28,236.75 and 7,145.93

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Solution

The fourth proportional to 18,831.89, 28,236.75 and 7,145.93 is: 10,714.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.89 : 28,236.75 = 7,145.93 : x
  2. Step 2: Convert to fraction form
    18,831.89/28,236.75 = 7,145.93/x
  3. Step 3: Cross multiply
    18,831.89x = 28,236.75 × 7,145.93
  4. Step 4: Simplify right side
    18,831.89x = 201,777,697.74
  5. Step 5: Solve for x
    x = 201,777,697.74/18,831.89
  6. Step 6: Final answer
    x = 10,714.68

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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.