Home / 5,166.51-7,129.78-2,808.65

Finding the Fourth Proportional to 5,166.51, 7,129.78 and 2,808.65

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Solution

The fourth proportional to 5,166.51, 7,129.78 and 2,808.65 is: 3,875.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,166.51 : 7,129.78 = 2,808.65 : x
  2. Step 2: Convert to fraction form
    5,166.51/7,129.78 = 2,808.65/x
  3. Step 3: Cross multiply
    5,166.51x = 7,129.78 × 2,808.65
  4. Step 4: Simplify right side
    5,166.51x = 20,025,056.60
  5. Step 5: Solve for x
    x = 20,025,056.60/5,166.51
  6. Step 6: Final answer
    x = 3,875.93

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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.