Home / 5,639.97-7,783.20-3,401.40

Finding the Fourth Proportional to 5,639.97, 7,783.20 and 3,401.40

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Solution

The fourth proportional to 5,639.97, 7,783.20 and 3,401.40 is: 4,693.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.97 : 7,783.20 = 3,401.40 : x
  2. Step 2: Convert to fraction form
    5,639.97/7,783.20 = 3,401.40/x
  3. Step 3: Cross multiply
    5,639.97x = 7,783.20 × 3,401.40
  4. Step 4: Simplify right side
    5,639.97x = 26,473,776.48
  5. Step 5: Solve for x
    x = 26,473,776.48/5,639.97
  6. Step 6: Final answer
    x = 4,693.96

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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.