Home / 20,865.60-31,296.60-7,718.10

Finding the Fourth Proportional to 20,865.60, 31,296.60 and 7,718.10

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Solution

The fourth proportional to 20,865.60, 31,296.60 and 7,718.10 is: 11,576.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.60 : 31,296.60 = 7,718.10 : x
  2. Step 2: Convert to fraction form
    20,865.60/31,296.60 = 7,718.10/x
  3. Step 3: Cross multiply
    20,865.60x = 31,296.60 × 7,718.10
  4. Step 4: Simplify right side
    20,865.60x = 241,550,288.46
  5. Step 5: Solve for x
    x = 241,550,288.46/20,865.60
  6. Step 6: Final answer
    x = 11,576.48

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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.