Home / 5,431.51-8,145.21-1,920.46

Finding the Fourth Proportional to 5,431.51, 8,145.21 and 1,920.46

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Solution

The fourth proportional to 5,431.51, 8,145.21 and 1,920.46 is: 2,879.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.51 : 8,145.21 = 1,920.46 : x
  2. Step 2: Convert to fraction form
    5,431.51/8,145.21 = 1,920.46/x
  3. Step 3: Cross multiply
    5,431.51x = 8,145.21 × 1,920.46
  4. Step 4: Simplify right side
    5,431.51x = 15,642,541.30
  5. Step 5: Solve for x
    x = 15,642,541.30/5,431.51
  6. Step 6: Final answer
    x = 2,879.96

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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.