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Finding the Fourth Proportional to 11,686.80, 17,519.80 and 4,289.55

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Solution

The fourth proportional to 11,686.80, 17,519.80 and 4,289.55 is: 6,430.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,686.80 : 17,519.80 = 4,289.55 : x
  2. Step 2: Convert to fraction form
    11,686.80/17,519.80 = 4,289.55/x
  3. Step 3: Cross multiply
    11,686.80x = 17,519.80 × 4,289.55
  4. Step 4: Simplify right side
    11,686.80x = 75,152,058.09
  5. Step 5: Solve for x
    x = 75,152,058.09/11,686.80
  6. Step 6: Final answer
    x = 6,430.51

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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.