Home / 13,440-20,155.96-5,647.08

Finding the Fourth Proportional to 13,440, 20,155.96 and 5,647.08

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Solution

The fourth proportional to 13,440, 20,155.96 and 5,647.08 is: 8,468.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440 : 20,155.96 = 5,647.08 : x
  2. Step 2: Convert to fraction form
    13,440/20,155.96 = 5,647.08/x
  3. Step 3: Cross multiply
    13,440x = 20,155.96 × 5,647.08
  4. Step 4: Simplify right side
    13,440x = 113,822,318.60
  5. Step 5: Solve for x
    x = 113,822,318.60/13,440
  6. Step 6: Final answer
    x = 8,468.92

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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.