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Finding the Fourth Proportional to 13,310.72, 19,966.08 and 6,291.44

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Solution

The fourth proportional to 13,310.72, 19,966.08 and 6,291.44 is: 9,437.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,310.72 : 19,966.08 = 6,291.44 : x
  2. Step 2: Convert to fraction form
    13,310.72/19,966.08 = 6,291.44/x
  3. Step 3: Cross multiply
    13,310.72x = 19,966.08 × 6,291.44
  4. Step 4: Simplify right side
    13,310.72x = 125,615,394.36
  5. Step 5: Solve for x
    x = 125,615,394.36/13,310.72
  6. Step 6: Final answer
    x = 9,437.16

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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.