Home / 5,426.80-8,128.05-4,190.20

Finding the Fourth Proportional to 5,426.80, 8,128.05 and 4,190.20

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Solution

The fourth proportional to 5,426.80, 8,128.05 and 4,190.20 is: 6,275.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,426.80 : 8,128.05 = 4,190.20 : x
  2. Step 2: Convert to fraction form
    5,426.80/8,128.05 = 4,190.20/x
  3. Step 3: Cross multiply
    5,426.80x = 8,128.05 × 4,190.20
  4. Step 4: Simplify right side
    5,426.80x = 34,058,155.11
  5. Step 5: Solve for x
    x = 34,058,155.11/5,426.80
  6. Step 6: Final answer
    x = 6,275.92

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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.