Home / 3,981.16-5,971.20-1,383.76

Finding the Fourth Proportional to 3,981.16, 5,971.20 and 1,383.76

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Solution

The fourth proportional to 3,981.16, 5,971.20 and 1,383.76 is: 2,075.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.16 : 5,971.20 = 1,383.76 : x
  2. Step 2: Convert to fraction form
    3,981.16/5,971.20 = 1,383.76/x
  3. Step 3: Cross multiply
    3,981.16x = 5,971.20 × 1,383.76
  4. Step 4: Simplify right side
    3,981.16x = 8,262,707.71
  5. Step 5: Solve for x
    x = 8,262,707.71/3,981.16
  6. Step 6: Final answer
    x = 2,075.45

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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.