Home / 5,165.90-7,128.94-2,808.03

Finding the Fourth Proportional to 5,165.90, 7,128.94 and 2,808.03

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Solution

The fourth proportional to 5,165.90, 7,128.94 and 2,808.03 is: 3,875.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.90 : 7,128.94 = 2,808.03 : x
  2. Step 2: Convert to fraction form
    5,165.90/7,128.94 = 2,808.03/x
  3. Step 3: Cross multiply
    5,165.90x = 7,128.94 × 2,808.03
  4. Step 4: Simplify right side
    5,165.90x = 20,018,277.39
  5. Step 5: Solve for x
    x = 20,018,277.39/5,165.90
  6. Step 6: Final answer
    x = 3,875.08

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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.