Home / 20,170.40-27,831.08-11,785.28

Finding the Fourth Proportional to 20,170.40, 27,831.08 and 11,785.28

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Solution

The fourth proportional to 20,170.40, 27,831.08 and 11,785.28 is: 16,261.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,170.40 : 27,831.08 = 11,785.28 : x
  2. Step 2: Convert to fraction form
    20,170.40/27,831.08 = 11,785.28/x
  3. Step 3: Cross multiply
    20,170.40x = 27,831.08 × 11,785.28
  4. Step 4: Simplify right side
    20,170.40x = 327,997,070.50
  5. Step 5: Solve for x
    x = 327,997,070.50/20,170.40
  6. Step 6: Final answer
    x = 16,261.31

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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.