Home / 5,421.33-8,129.16-1,909.98

Finding the Fourth Proportional to 5,421.33, 8,129.16 and 1,909.98

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Solution

The fourth proportional to 5,421.33, 8,129.16 and 1,909.98 is: 2,863.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.33 : 8,129.16 = 1,909.98 : x
  2. Step 2: Convert to fraction form
    5,421.33/8,129.16 = 1,909.98/x
  3. Step 3: Cross multiply
    5,421.33x = 8,129.16 × 1,909.98
  4. Step 4: Simplify right side
    5,421.33x = 15,526,533.02
  5. Step 5: Solve for x
    x = 15,526,533.02/5,421.33
  6. Step 6: Final answer
    x = 2,863.97

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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.