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Finding the Fourth Proportional to 9,000.84, 13,500.80 and 3,157

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Solution

The fourth proportional to 9,000.84, 13,500.80 and 3,157 is: 4,735.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,000.84 : 13,500.80 = 3,157 : x
  2. Step 2: Convert to fraction form
    9,000.84/13,500.80 = 3,157/x
  3. Step 3: Cross multiply
    9,000.84x = 13,500.80 × 3,157
  4. Step 4: Simplify right side
    9,000.84x = 42,622,025.60
  5. Step 5: Solve for x
    x = 42,622,025.60/9,000.84
  6. Step 6: Final answer
    x = 4,735.34

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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.