Home / 2,129.52-3,186.27-1,913.70

Finding the Fourth Proportional to 2,129.52, 3,186.27 and 1,913.70

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Solution

The fourth proportional to 2,129.52, 3,186.27 and 1,913.70 is: 2,863.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.52 : 3,186.27 = 1,913.70 : x
  2. Step 2: Convert to fraction form
    2,129.52/3,186.27 = 1,913.70/x
  3. Step 3: Cross multiply
    2,129.52x = 3,186.27 × 1,913.70
  4. Step 4: Simplify right side
    2,129.52x = 6,097,564.90
  5. Step 5: Solve for x
    x = 6,097,564.90/2,129.52
  6. Step 6: Final answer
    x = 2,863.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.