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Finding the Fourth Proportional to 5,385.99, 8,078.72 and 1,874.91

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Solution

The fourth proportional to 5,385.99, 8,078.72 and 1,874.91 is: 2,812.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.99 : 8,078.72 = 1,874.91 : x
  2. Step 2: Convert to fraction form
    5,385.99/8,078.72 = 1,874.91/x
  3. Step 3: Cross multiply
    5,385.99x = 8,078.72 × 1,874.91
  4. Step 4: Simplify right side
    5,385.99x = 15,146,904.38
  5. Step 5: Solve for x
    x = 15,146,904.38/5,385.99
  6. Step 6: Final answer
    x = 2,812.28

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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.