Home / 5,122.99-7,070.40-2,885.30

Finding the Fourth Proportional to 5,122.99, 7,070.40 and 2,885.30

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Solution

The fourth proportional to 5,122.99, 7,070.40 and 2,885.30 is: 3,982.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,122.99 : 7,070.40 = 2,885.30 : x
  2. Step 2: Convert to fraction form
    5,122.99/7,070.40 = 2,885.30/x
  3. Step 3: Cross multiply
    5,122.99x = 7,070.40 × 2,885.30
  4. Step 4: Simplify right side
    5,122.99x = 20,400,210.69
  5. Step 5: Solve for x
    x = 20,400,210.69/5,122.99
  6. Step 6: Final answer
    x = 3,982.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.