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Finding the Fourth Proportional to 13,203.55, 19,808.55 and 4,319.40

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Solution

The fourth proportional to 13,203.55, 19,808.55 and 4,319.40 is: 6,480.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,203.55 : 19,808.55 = 4,319.40 : x
  2. Step 2: Convert to fraction form
    13,203.55/19,808.55 = 4,319.40/x
  3. Step 3: Cross multiply
    13,203.55x = 19,808.55 × 4,319.40
  4. Step 4: Simplify right side
    13,203.55x = 85,560,951.83
  5. Step 5: Solve for x
    x = 85,560,951.83/13,203.55
  6. Step 6: Final answer
    x = 6,480.15

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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.