Home / 3,140.72-4,325.10-2,985.20

Finding the Fourth Proportional to 3,140.72, 4,325.10 and 2,985.20

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Solution

The fourth proportional to 3,140.72, 4,325.10 and 2,985.20 is: 4,110.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.72 : 4,325.10 = 2,985.20 : x
  2. Step 2: Convert to fraction form
    3,140.72/4,325.10 = 2,985.20/x
  3. Step 3: Cross multiply
    3,140.72x = 4,325.10 × 2,985.20
  4. Step 4: Simplify right side
    3,140.72x = 12,911,288.52
  5. Step 5: Solve for x
    x = 12,911,288.52/3,140.72
  6. Step 6: Final answer
    x = 4,110.93

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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.