Home / 5,421.13-8,130.79-1,910.31

Finding the Fourth Proportional to 5,421.13, 8,130.79 and 1,910.31

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Solution

The fourth proportional to 5,421.13, 8,130.79 and 1,910.31 is: 2,865.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.13 : 8,130.79 = 1,910.31 : x
  2. Step 2: Convert to fraction form
    5,421.13/8,130.79 = 1,910.31/x
  3. Step 3: Cross multiply
    5,421.13x = 8,130.79 × 1,910.31
  4. Step 4: Simplify right side
    5,421.13x = 15,532,329.44
  5. Step 5: Solve for x
    x = 15,532,329.44/5,421.13
  6. Step 6: Final answer
    x = 2,865.15

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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.