Home / 7,347.22-10,139.20-3,990.06

Finding the Fourth Proportional to 7,347.22, 10,139.20 and 3,990.06

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Solution

The fourth proportional to 7,347.22, 10,139.20 and 3,990.06 is: 5,506.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,347.22 : 10,139.20 = 3,990.06 : x
  2. Step 2: Convert to fraction form
    7,347.22/10,139.20 = 3,990.06/x
  3. Step 3: Cross multiply
    7,347.22x = 10,139.20 × 3,990.06
  4. Step 4: Simplify right side
    7,347.22x = 40,456,016.35
  5. Step 5: Solve for x
    x = 40,456,016.35/7,347.22
  6. Step 6: Final answer
    x = 5,506.30

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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.