Home / 5,420.16-8,128.40-1,523.66

Finding the Fourth Proportional to 5,420.16, 8,128.40 and 1,523.66

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Solution

The fourth proportional to 5,420.16, 8,128.40 and 1,523.66 is: 2,284.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.16 : 8,128.40 = 1,523.66 : x
  2. Step 2: Convert to fraction form
    5,420.16/8,128.40 = 1,523.66/x
  3. Step 3: Cross multiply
    5,420.16x = 8,128.40 × 1,523.66
  4. Step 4: Simplify right side
    5,420.16x = 12,384,917.94
  5. Step 5: Solve for x
    x = 12,384,917.94/5,420.16
  6. Step 6: Final answer
    x = 2,284.97

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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.