Home / 5,166.40-7,129.64-2,808.53

Finding the Fourth Proportional to 5,166.40, 7,129.64 and 2,808.53

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Solution

The fourth proportional to 5,166.40, 7,129.64 and 2,808.53 is: 3,875.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,166.40 : 7,129.64 = 2,808.53 : x
  2. Step 2: Convert to fraction form
    5,166.40/7,129.64 = 2,808.53/x
  3. Step 3: Cross multiply
    5,166.40x = 7,129.64 × 2,808.53
  4. Step 4: Simplify right side
    5,166.40x = 20,023,807.83
  5. Step 5: Solve for x
    x = 20,023,807.83/5,166.40
  6. Step 6: Final answer
    x = 3,875.78

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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.