Home / 5,051.40-7,578.12-2,129.70

Finding the Fourth Proportional to 5,051.40, 7,578.12 and 2,129.70

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Solution

The fourth proportional to 5,051.40, 7,578.12 and 2,129.70 is: 3,194.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,051.40 : 7,578.12 = 2,129.70 : x
  2. Step 2: Convert to fraction form
    5,051.40/7,578.12 = 2,129.70/x
  3. Step 3: Cross multiply
    5,051.40x = 7,578.12 × 2,129.70
  4. Step 4: Simplify right side
    5,051.40x = 16,139,122.16
  5. Step 5: Solve for x
    x = 16,139,122.16/5,051.40
  6. Step 6: Final answer
    x = 3,194.98

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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.