Home / 55,420.47-83,138.91-20,357.39

Finding the Fourth Proportional to 55,420.47, 83,138.91 and 20,357.39

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Solution

The fourth proportional to 55,420.47, 83,138.91 and 20,357.39 is: 30,539.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,420.47 : 83,138.91 = 20,357.39 : x
  2. Step 2: Convert to fraction form
    55,420.47/83,138.91 = 20,357.39/x
  3. Step 3: Cross multiply
    55,420.47x = 83,138.91 × 20,357.39
  4. Step 4: Simplify right side
    55,420.47x = 1,692,491,346.55
  5. Step 5: Solve for x
    x = 1,692,491,346.55/55,420.47
  6. Step 6: Final answer
    x = 30,539.10

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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.