Home / 7,990.30-11,018.91-5,158.54

Finding the Fourth Proportional to 7,990.30, 11,018.91 and 5,158.54

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Solution

The fourth proportional to 7,990.30, 11,018.91 and 5,158.54 is: 7,113.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.30 : 11,018.91 = 5,158.54 : x
  2. Step 2: Convert to fraction form
    7,990.30/11,018.91 = 5,158.54/x
  3. Step 3: Cross multiply
    7,990.30x = 11,018.91 × 5,158.54
  4. Step 4: Simplify right side
    7,990.30x = 56,841,487.99
  5. Step 5: Solve for x
    x = 56,841,487.99/7,990.30
  6. Step 6: Final answer
    x = 7,113.81

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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.