Home / 5,185.12-7,778.98-1,487.66

Finding the Fourth Proportional to 5,185.12, 7,778.98 and 1,487.66

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Solution

The fourth proportional to 5,185.12, 7,778.98 and 1,487.66 is: 2,231.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,185.12 : 7,778.98 = 1,487.66 : x
  2. Step 2: Convert to fraction form
    5,185.12/7,778.98 = 1,487.66/x
  3. Step 3: Cross multiply
    5,185.12x = 7,778.98 × 1,487.66
  4. Step 4: Simplify right side
    5,185.12x = 11,572,477.39
  5. Step 5: Solve for x
    x = 11,572,477.39/5,185.12
  6. Step 6: Final answer
    x = 2,231.86

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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.