Home / 20,858.76-31,288.24-5,276.40

Finding the Fourth Proportional to 20,858.76, 31,288.24 and 5,276.40

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Solution

The fourth proportional to 20,858.76, 31,288.24 and 5,276.40 is: 7,914.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.76 : 31,288.24 = 5,276.40 : x
  2. Step 2: Convert to fraction form
    20,858.76/31,288.24 = 5,276.40/x
  3. Step 3: Cross multiply
    20,858.76x = 31,288.24 × 5,276.40
  4. Step 4: Simplify right side
    20,858.76x = 165,089,269.54
  5. Step 5: Solve for x
    x = 165,089,269.54/20,858.76
  6. Step 6: Final answer
    x = 7,914.63

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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.