Home / 13,730.31-20,595.42-5,405.81

Finding the Fourth Proportional to 13,730.31, 20,595.42 and 5,405.81

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Solution

The fourth proportional to 13,730.31, 20,595.42 and 5,405.81 is: 8,108.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,730.31 : 20,595.42 = 5,405.81 : x
  2. Step 2: Convert to fraction form
    13,730.31/20,595.42 = 5,405.81/x
  3. Step 3: Cross multiply
    13,730.31x = 20,595.42 × 5,405.81
  4. Step 4: Simplify right side
    13,730.31x = 111,334,824.41
  5. Step 5: Solve for x
    x = 111,334,824.41/13,730.31
  6. Step 6: Final answer
    x = 8,108.69

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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.