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Finding the Fourth Proportional to 13,615.39, 18,788.92 and 7,565.30

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Solution

The fourth proportional to 13,615.39, 18,788.92 and 7,565.30 is: 10,439.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.39 : 18,788.92 = 7,565.30 : x
  2. Step 2: Convert to fraction form
    13,615.39/18,788.92 = 7,565.30/x
  3. Step 3: Cross multiply
    13,615.39x = 18,788.92 × 7,565.30
  4. Step 4: Simplify right side
    13,615.39x = 142,143,816.48
  5. Step 5: Solve for x
    x = 142,143,816.48/13,615.39
  6. Step 6: Final answer
    x = 10,439.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.