Home / 18,831.51-28,236.20-7,145.55

Finding the Fourth Proportional to 18,831.51, 28,236.20 and 7,145.55

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Solution

The fourth proportional to 18,831.51, 28,236.20 and 7,145.55 is: 10,714.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.51 : 28,236.20 = 7,145.55 : x
  2. Step 2: Convert to fraction form
    18,831.51/28,236.20 = 7,145.55/x
  3. Step 3: Cross multiply
    18,831.51x = 28,236.20 × 7,145.55
  4. Step 4: Simplify right side
    18,831.51x = 201,763,143.18
  5. Step 5: Solve for x
    x = 201,763,143.18/18,831.51
  6. Step 6: Final answer
    x = 10,714.12

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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.