Home / 3,989.84-5,981.16-1,681.52

Finding the Fourth Proportional to 3,989.84, 5,981.16 and 1,681.52

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Solution

The fourth proportional to 3,989.84, 5,981.16 and 1,681.52 is: 2,520.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.84 : 5,981.16 = 1,681.52 : x
  2. Step 2: Convert to fraction form
    3,989.84/5,981.16 = 1,681.52/x
  3. Step 3: Cross multiply
    3,989.84x = 5,981.16 × 1,681.52
  4. Step 4: Simplify right side
    3,989.84x = 10,057,440.16
  5. Step 5: Solve for x
    x = 10,057,440.16/3,989.84
  6. Step 6: Final answer
    x = 2,520.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.