Home / 5,420.14-8,130.18-1,909.33

Finding the Fourth Proportional to 5,420.14, 8,130.18 and 1,909.33

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Solution

The fourth proportional to 5,420.14, 8,130.18 and 1,909.33 is: 2,863.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.14 : 8,130.18 = 1,909.33 : x
  2. Step 2: Convert to fraction form
    5,420.14/8,130.18 = 1,909.33/x
  3. Step 3: Cross multiply
    5,420.14x = 8,130.18 × 1,909.33
  4. Step 4: Simplify right side
    5,420.14x = 15,523,196.58
  5. Step 5: Solve for x
    x = 15,523,196.58/5,420.14
  6. Step 6: Final answer
    x = 2,863.98

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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.