Home / 5,321.09-7,985.39-1,992.20

Finding the Fourth Proportional to 5,321.09, 7,985.39 and 1,992.20

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Solution

The fourth proportional to 5,321.09, 7,985.39 and 1,992.20 is: 2,989.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321.09 : 7,985.39 = 1,992.20 : x
  2. Step 2: Convert to fraction form
    5,321.09/7,985.39 = 1,992.20/x
  3. Step 3: Cross multiply
    5,321.09x = 7,985.39 × 1,992.20
  4. Step 4: Simplify right side
    5,321.09x = 15,908,444.07
  5. Step 5: Solve for x
    x = 15,908,444.07/5,321.09
  6. Step 6: Final answer
    x = 2,989.70

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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.