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Finding the Fourth Proportional to 62,820.44, 86,683.86 and 38,938.44

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Solution

The fourth proportional to 62,820.44, 86,683.86 and 38,938.44 is: 53,729.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,820.44 : 86,683.86 = 38,938.44 : x
  2. Step 2: Convert to fraction form
    62,820.44/86,683.86 = 38,938.44/x
  3. Step 3: Cross multiply
    62,820.44x = 86,683.86 × 38,938.44
  4. Step 4: Simplify right side
    62,820.44x = 3,375,334,281.58
  5. Step 5: Solve for x
    x = 3,375,334,281.58/62,820.44
  6. Step 6: Final answer
    x = 53,729.87

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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.