Home / 3,947.76-5,445.90-2,530.80

Finding the Fourth Proportional to 3,947.76, 5,445.90 and 2,530.80

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Solution

The fourth proportional to 3,947.76, 5,445.90 and 2,530.80 is: 3,491.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.76 : 5,445.90 = 2,530.80 : x
  2. Step 2: Convert to fraction form
    3,947.76/5,445.90 = 2,530.80/x
  3. Step 3: Cross multiply
    3,947.76x = 5,445.90 × 2,530.80
  4. Step 4: Simplify right side
    3,947.76x = 13,782,483.72
  5. Step 5: Solve for x
    x = 13,782,483.72/3,947.76
  6. Step 6: Final answer
    x = 3,491.22

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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.