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Finding the Fourth Proportional to 13,379.52, 20,054.16 and 6,445.92

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Solution

The fourth proportional to 13,379.52, 20,054.16 and 6,445.92 is: 9,661.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,379.52 : 20,054.16 = 6,445.92 : x
  2. Step 2: Convert to fraction form
    13,379.52/20,054.16 = 6,445.92/x
  3. Step 3: Cross multiply
    13,379.52x = 20,054.16 × 6,445.92
  4. Step 4: Simplify right side
    13,379.52x = 129,267,511.03
  5. Step 5: Solve for x
    x = 129,267,511.03/13,379.52
  6. Step 6: Final answer
    x = 9,661.60

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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.