Home / 3,981.80-5,497.38-3,607.40

Finding the Fourth Proportional to 3,981.80, 5,497.38 and 3,607.40

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Solution

The fourth proportional to 3,981.80, 5,497.38 and 3,607.40 is: 4,980.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.80 : 5,497.38 = 3,607.40 : x
  2. Step 2: Convert to fraction form
    3,981.80/5,497.38 = 3,607.40/x
  3. Step 3: Cross multiply
    3,981.80x = 5,497.38 × 3,607.40
  4. Step 4: Simplify right side
    3,981.80x = 19,831,248.61
  5. Step 5: Solve for x
    x = 19,831,248.61/3,981.80
  6. Step 6: Final answer
    x = 4,980.47

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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.