Home / 3,640.48-5,023.52-2,128.40

Finding the Fourth Proportional to 3,640.48, 5,023.52 and 2,128.40

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Solution

The fourth proportional to 3,640.48, 5,023.52 and 2,128.40 is: 2,936.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640.48 : 5,023.52 = 2,128.40 : x
  2. Step 2: Convert to fraction form
    3,640.48/5,023.52 = 2,128.40/x
  3. Step 3: Cross multiply
    3,640.48x = 5,023.52 × 2,128.40
  4. Step 4: Simplify right side
    3,640.48x = 10,692,024.21
  5. Step 5: Solve for x
    x = 10,692,024.21/3,640.48
  6. Step 6: Final answer
    x = 2,936.98

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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.