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Finding the Fourth Proportional to 5,158.05, 7,721.93 and 4,665.60

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Solution

The fourth proportional to 5,158.05, 7,721.93 and 4,665.60 is: 6,984.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158.05 : 7,721.93 = 4,665.60 : x
  2. Step 2: Convert to fraction form
    5,158.05/7,721.93 = 4,665.60/x
  3. Step 3: Cross multiply
    5,158.05x = 7,721.93 × 4,665.60
  4. Step 4: Simplify right side
    5,158.05x = 36,027,448.27
  5. Step 5: Solve for x
    x = 36,027,448.27/5,158.05
  6. Step 6: Final answer
    x = 6,984.70

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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.