Home / 20,881.76-31,319.60-6,086.70

Finding the Fourth Proportional to 20,881.76, 31,319.60 and 6,086.70

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Solution

The fourth proportional to 20,881.76, 31,319.60 and 6,086.70 is: 9,129.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.76 : 31,319.60 = 6,086.70 : x
  2. Step 2: Convert to fraction form
    20,881.76/31,319.60 = 6,086.70/x
  3. Step 3: Cross multiply
    20,881.76x = 31,319.60 × 6,086.70
  4. Step 4: Simplify right side
    20,881.76x = 190,633,009.32
  5. Step 5: Solve for x
    x = 190,633,009.32/20,881.76
  6. Step 6: Final answer
    x = 9,129.16

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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.