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Finding the Fourth Proportional to 18,685.92, 28,040.64 and 7,592.88

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Solution

The fourth proportional to 18,685.92, 28,040.64 and 7,592.88 is: 11,394.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685.92 : 28,040.64 = 7,592.88 : x
  2. Step 2: Convert to fraction form
    18,685.92/28,040.64 = 7,592.88/x
  3. Step 3: Cross multiply
    18,685.92x = 28,040.64 × 7,592.88
  4. Step 4: Simplify right side
    18,685.92x = 212,909,214.64
  5. Step 5: Solve for x
    x = 212,909,214.64/18,685.92
  6. Step 6: Final answer
    x = 11,394.10

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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.