Home / 3,929.84-5,851.12-3,910.40

Finding the Fourth Proportional to 3,929.84, 5,851.12 and 3,910.40

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Solution

The fourth proportional to 3,929.84, 5,851.12 and 3,910.40 is: 5,822.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.84 : 5,851.12 = 3,910.40 : x
  2. Step 2: Convert to fraction form
    3,929.84/5,851.12 = 3,910.40/x
  3. Step 3: Cross multiply
    3,929.84x = 5,851.12 × 3,910.40
  4. Step 4: Simplify right side
    3,929.84x = 22,880,219.65
  5. Step 5: Solve for x
    x = 22,880,219.65/3,929.84
  6. Step 6: Final answer
    x = 5,822.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.