Home / 5,120.40-7,681.58-2,000.28

Finding the Fourth Proportional to 5,120.40, 7,681.58 and 2,000.28

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Solution

The fourth proportional to 5,120.40, 7,681.58 and 2,000.28 is: 3,000.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.40 : 7,681.58 = 2,000.28 : x
  2. Step 2: Convert to fraction form
    5,120.40/7,681.58 = 2,000.28/x
  3. Step 3: Cross multiply
    5,120.40x = 7,681.58 × 2,000.28
  4. Step 4: Simplify right side
    5,120.40x = 15,365,310.84
  5. Step 5: Solve for x
    x = 15,365,310.84/5,120.40
  6. Step 6: Final answer
    x = 3,000.80

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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.