Home / 13,405.62-20,109.30-4,639.38

Finding the Fourth Proportional to 13,405.62, 20,109.30 and 4,639.38

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Solution

The fourth proportional to 13,405.62, 20,109.30 and 4,639.38 is: 6,959.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.62 : 20,109.30 = 4,639.38 : x
  2. Step 2: Convert to fraction form
    13,405.62/20,109.30 = 4,639.38/x
  3. Step 3: Cross multiply
    13,405.62x = 20,109.30 × 4,639.38
  4. Step 4: Simplify right side
    13,405.62x = 93,294,684.23
  5. Step 5: Solve for x
    x = 93,294,684.23/13,405.62
  6. Step 6: Final answer
    x = 6,959.37

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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.