Home / 5,188.79-7,157.40-3,171.28

Finding the Fourth Proportional to 5,188.79, 7,157.40 and 3,171.28

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Solution

The fourth proportional to 5,188.79, 7,157.40 and 3,171.28 is: 4,374.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,188.79 : 7,157.40 = 3,171.28 : x
  2. Step 2: Convert to fraction form
    5,188.79/7,157.40 = 3,171.28/x
  3. Step 3: Cross multiply
    5,188.79x = 7,157.40 × 3,171.28
  4. Step 4: Simplify right side
    5,188.79x = 22,698,119.47
  5. Step 5: Solve for x
    x = 22,698,119.47/5,188.79
  6. Step 6: Final answer
    x = 4,374.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.