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Finding the Fourth Proportional to 18,880.39, 28,320.59 and 8,989.68

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Solution

The fourth proportional to 18,880.39, 28,320.59 and 8,989.68 is: 13,484.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,880.39 : 28,320.59 = 8,989.68 : x
  2. Step 2: Convert to fraction form
    18,880.39/28,320.59 = 8,989.68/x
  3. Step 3: Cross multiply
    18,880.39x = 28,320.59 × 8,989.68
  4. Step 4: Simplify right side
    18,880.39x = 254,593,119.62
  5. Step 5: Solve for x
    x = 254,593,119.62/18,880.39
  6. Step 6: Final answer
    x = 13,484.53

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Similar ratio
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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.