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Finding the Fourth Proportional to 18,999.84, 28,486.08 and 7,151.76

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Solution

The fourth proportional to 18,999.84, 28,486.08 and 7,151.76 is: 10,722.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.84 : 28,486.08 = 7,151.76 : x
  2. Step 2: Convert to fraction form
    18,999.84/28,486.08 = 7,151.76/x
  3. Step 3: Cross multiply
    18,999.84x = 28,486.08 × 7,151.76
  4. Step 4: Simplify right side
    18,999.84x = 203,725,607.50
  5. Step 5: Solve for x
    x = 203,725,607.50/18,999.84
  6. Step 6: Final answer
    x = 10,722.49

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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.