Home / 5,405.40-7,461.84-3,986.64

Finding the Fourth Proportional to 5,405.40, 7,461.84 and 3,986.64

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Solution

The fourth proportional to 5,405.40, 7,461.84 and 3,986.64 is: 5,503.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,405.40 : 7,461.84 = 3,986.64 : x
  2. Step 2: Convert to fraction form
    5,405.40/7,461.84 = 3,986.64/x
  3. Step 3: Cross multiply
    5,405.40x = 7,461.84 × 3,986.64
  4. Step 4: Simplify right side
    5,405.40x = 29,747,669.82
  5. Step 5: Solve for x
    x = 29,747,669.82/5,405.40
  6. Step 6: Final answer
    x = 5,503.32

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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.