Home / 5,166.15-7,129.36-2,808.28

Finding the Fourth Proportional to 5,166.15, 7,129.36 and 2,808.28

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Solution

The fourth proportional to 5,166.15, 7,129.36 and 2,808.28 is: 3,875.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,166.15 : 7,129.36 = 2,808.28 : x
  2. Step 2: Convert to fraction form
    5,166.15/7,129.36 = 2,808.28/x
  3. Step 3: Cross multiply
    5,166.15x = 7,129.36 × 2,808.28
  4. Step 4: Simplify right side
    5,166.15x = 20,021,239.10
  5. Step 5: Solve for x
    x = 20,021,239.10/5,166.15
  6. Step 6: Final answer
    x = 3,875.47

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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.