Home / 5,509.40-8,272.20-4,278.20

Finding the Fourth Proportional to 5,509.40, 8,272.20 and 4,278.20

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Solution

The fourth proportional to 5,509.40, 8,272.20 and 4,278.20 is: 6,423.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,509.40 : 8,272.20 = 4,278.20 : x
  2. Step 2: Convert to fraction form
    5,509.40/8,272.20 = 4,278.20/x
  3. Step 3: Cross multiply
    5,509.40x = 8,272.20 × 4,278.20
  4. Step 4: Simplify right side
    5,509.40x = 35,390,126.04
  5. Step 5: Solve for x
    x = 35,390,126.04/5,509.40
  6. Step 6: Final answer
    x = 6,423.59

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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.