Home / 5,129.16-7,078.08-2,890.98

Finding the Fourth Proportional to 5,129.16, 7,078.08 and 2,890.98

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Solution

The fourth proportional to 5,129.16, 7,078.08 and 2,890.98 is: 3,989.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.16 : 7,078.08 = 2,890.98 : x
  2. Step 2: Convert to fraction form
    5,129.16/7,078.08 = 2,890.98/x
  3. Step 3: Cross multiply
    5,129.16x = 7,078.08 × 2,890.98
  4. Step 4: Simplify right side
    5,129.16x = 20,462,587.72
  5. Step 5: Solve for x
    x = 20,462,587.72/5,129.16
  6. Step 6: Final answer
    x = 3,989.46

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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.