Home / 7,347.57-10,139.36-3,990.31

Finding the Fourth Proportional to 7,347.57, 10,139.36 and 3,990.31

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Solution

The fourth proportional to 7,347.57, 10,139.36 and 3,990.31 is: 5,506.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,347.57 : 10,139.36 = 3,990.31 : x
  2. Step 2: Convert to fraction form
    7,347.57/10,139.36 = 3,990.31/x
  3. Step 3: Cross multiply
    7,347.57x = 10,139.36 × 3,990.31
  4. Step 4: Simplify right side
    7,347.57x = 40,459,138.90
  5. Step 5: Solve for x
    x = 40,459,138.90/7,347.57
  6. Step 6: Final answer
    x = 5,506.47

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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.