Home / 15,095.09-20,831.90-8,380.81

Finding the Fourth Proportional to 15,095.09, 20,831.90 and 8,380.81

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Solution

The fourth proportional to 15,095.09, 20,831.90 and 8,380.81 is: 11,565.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,095.09 : 20,831.90 = 8,380.81 : x
  2. Step 2: Convert to fraction form
    15,095.09/20,831.90 = 8,380.81/x
  3. Step 3: Cross multiply
    15,095.09x = 20,831.90 × 8,380.81
  4. Step 4: Simplify right side
    15,095.09x = 174,588,101.86
  5. Step 5: Solve for x
    x = 174,588,101.86/15,095.09
  6. Step 6: Final answer
    x = 11,565.88

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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.