Home / 3,702.69-5,109.67-2,130.78

Finding the Fourth Proportional to 3,702.69, 5,109.67 and 2,130.78

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Solution

The fourth proportional to 3,702.69, 5,109.67 and 2,130.78 is: 2,940.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,702.69 : 5,109.67 = 2,130.78 : x
  2. Step 2: Convert to fraction form
    3,702.69/5,109.67 = 2,130.78/x
  3. Step 3: Cross multiply
    3,702.69x = 5,109.67 × 2,130.78
  4. Step 4: Simplify right side
    3,702.69x = 10,887,582.64
  5. Step 5: Solve for x
    x = 10,887,582.64/3,702.69
  6. Step 6: Final answer
    x = 2,940.45

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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.