Home / 20,720.15-31,079.79-5,928.96

Finding the Fourth Proportional to 20,720.15, 31,079.79 and 5,928.96

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Solution

The fourth proportional to 20,720.15, 31,079.79 and 5,928.96 is: 8,893.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.15 : 31,079.79 = 5,928.96 : x
  2. Step 2: Convert to fraction form
    20,720.15/31,079.79 = 5,928.96/x
  3. Step 3: Cross multiply
    20,720.15x = 31,079.79 × 5,928.96
  4. Step 4: Simplify right side
    20,720.15x = 184,270,831.72
  5. Step 5: Solve for x
    x = 184,270,831.72/20,720.15
  6. Step 6: Final answer
    x = 8,893.32

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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.