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Finding the Fourth Proportional to 13,494.84, 18,612.36 and 8,780.64

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Solution

The fourth proportional to 13,494.84, 18,612.36 and 8,780.64 is: 12,110.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,494.84 : 18,612.36 = 8,780.64 : x
  2. Step 2: Convert to fraction form
    13,494.84/18,612.36 = 8,780.64/x
  3. Step 3: Cross multiply
    13,494.84x = 18,612.36 × 8,780.64
  4. Step 4: Simplify right side
    13,494.84x = 163,428,432.71
  5. Step 5: Solve for x
    x = 163,428,432.71/13,494.84
  6. Step 6: Final answer
    x = 12,110.44

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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.