Home / 5,122.77-7,070.10-2,885.09

Finding the Fourth Proportional to 5,122.77, 7,070.10 and 2,885.09

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Solution

The fourth proportional to 5,122.77, 7,070.10 and 2,885.09 is: 3,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,122.77 : 7,070.10 = 2,885.09 : x
  2. Step 2: Convert to fraction form
    5,122.77/7,070.10 = 2,885.09/x
  3. Step 3: Cross multiply
    5,122.77x = 7,070.10 × 2,885.09
  4. Step 4: Simplify right side
    5,122.77x = 20,397,828.64
  5. Step 5: Solve for x
    x = 20,397,828.64/5,122.77
  6. Step 6: Final answer
    x = 3,981.80

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Half scale
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Double scale
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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.