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Finding the Fourth Proportional to 18,731.25, 28,096.88 and 4,880.25

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Solution

The fourth proportional to 18,731.25, 28,096.88 and 4,880.25 is: 7,320.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.25 : 28,096.88 = 4,880.25 : x
  2. Step 2: Convert to fraction form
    18,731.25/28,096.88 = 4,880.25/x
  3. Step 3: Cross multiply
    18,731.25x = 28,096.88 × 4,880.25
  4. Step 4: Simplify right side
    18,731.25x = 137,119,774.22
  5. Step 5: Solve for x
    x = 137,119,774.22/18,731.25
  6. Step 6: Final answer
    x = 7,320.38

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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.