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Finding the Fourth Proportional to 5,443.60, 8,143.80 and 4,721.20

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Solution

The fourth proportional to 5,443.60, 8,143.80 and 4,721.20 is: 7,063.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,443.60 : 8,143.80 = 4,721.20 : x
  2. Step 2: Convert to fraction form
    5,443.60/8,143.80 = 4,721.20/x
  3. Step 3: Cross multiply
    5,443.60x = 8,143.80 × 4,721.20
  4. Step 4: Simplify right side
    5,443.60x = 38,448,508.56
  5. Step 5: Solve for x
    x = 38,448,508.56/5,443.60
  6. Step 6: Final answer
    x = 7,063.07

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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.