Home / 5,415.28-8,122.80-1,519.59

Finding the Fourth Proportional to 5,415.28, 8,122.80 and 1,519.59

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Solution

The fourth proportional to 5,415.28, 8,122.80 and 1,519.59 is: 2,279.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.28 : 8,122.80 = 1,519.59 : x
  2. Step 2: Convert to fraction form
    5,415.28/8,122.80 = 1,519.59/x
  3. Step 3: Cross multiply
    5,415.28x = 8,122.80 × 1,519.59
  4. Step 4: Simplify right side
    5,415.28x = 12,343,325.65
  5. Step 5: Solve for x
    x = 12,343,325.65/5,415.28
  6. Step 6: Final answer
    x = 2,279.35

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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.