Home / 5,165.55-7,129.76-2,928.77

Finding the Fourth Proportional to 5,165.55, 7,129.76 and 2,928.77

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Solution

The fourth proportional to 5,165.55, 7,129.76 and 2,928.77 is: 4,042.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.55 : 7,129.76 = 2,928.77 : x
  2. Step 2: Convert to fraction form
    5,165.55/7,129.76 = 2,928.77/x
  3. Step 3: Cross multiply
    5,165.55x = 7,129.76 × 2,928.77
  4. Step 4: Simplify right side
    5,165.55x = 20,881,403.64
  5. Step 5: Solve for x
    x = 20,881,403.64/5,165.55
  6. Step 6: Final answer
    x = 4,042.44

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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.