Home / 13,432.80-20,140.56-5,639.52

Finding the Fourth Proportional to 13,432.80, 20,140.56 and 5,639.52

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Solution

The fourth proportional to 13,432.80, 20,140.56 and 5,639.52 is: 8,455.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,432.80 : 20,140.56 = 5,639.52 : x
  2. Step 2: Convert to fraction form
    13,432.80/20,140.56 = 5,639.52/x
  3. Step 3: Cross multiply
    13,432.80x = 20,140.56 × 5,639.52
  4. Step 4: Simplify right side
    13,432.80x = 113,583,090.93
  5. Step 5: Solve for x
    x = 113,583,090.93/13,432.80
  6. Step 6: Final answer
    x = 8,455.65

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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.