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Finding the Fourth Proportional to 13,489.77, 18,612.72 and 8,184.45

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Solution

The fourth proportional to 13,489.77, 18,612.72 and 8,184.45 is: 11,292.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.77 : 18,612.72 = 8,184.45 : x
  2. Step 2: Convert to fraction form
    13,489.77/18,612.72 = 8,184.45/x
  3. Step 3: Cross multiply
    13,489.77x = 18,612.72 × 8,184.45
  4. Step 4: Simplify right side
    13,489.77x = 152,334,876.20
  5. Step 5: Solve for x
    x = 152,334,876.20/13,489.77
  6. Step 6: Final answer
    x = 11,292.62

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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.