Home / 5,424.60-8,136.90-1,961.40

Finding the Fourth Proportional to 5,424.60, 8,136.90 and 1,961.40

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Solution

The fourth proportional to 5,424.60, 8,136.90 and 1,961.40 is: 2,942.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,424.60 : 8,136.90 = 1,961.40 : x
  2. Step 2: Convert to fraction form
    5,424.60/8,136.90 = 1,961.40/x
  3. Step 3: Cross multiply
    5,424.60x = 8,136.90 × 1,961.40
  4. Step 4: Simplify right side
    5,424.60x = 15,959,715.66
  5. Step 5: Solve for x
    x = 15,959,715.66/5,424.60
  6. Step 6: Final answer
    x = 2,942.10

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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.