Home / 5,721.84-7,894.80-4,147.20

Finding the Fourth Proportional to 5,721.84, 7,894.80 and 4,147.20

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Solution

The fourth proportional to 5,721.84, 7,894.80 and 4,147.20 is: 5,722.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,721.84 : 7,894.80 = 4,147.20 : x
  2. Step 2: Convert to fraction form
    5,721.84/7,894.80 = 4,147.20/x
  3. Step 3: Cross multiply
    5,721.84x = 7,894.80 × 4,147.20
  4. Step 4: Simplify right side
    5,721.84x = 32,741,314.56
  5. Step 5: Solve for x
    x = 32,741,314.56/5,721.84
  6. Step 6: Final answer
    x = 5,722.17

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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.