Home / 4,072.40-6,108.80-2,128.40

Finding the Fourth Proportional to 4,072.40, 6,108.80 and 2,128.40

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Solution

The fourth proportional to 4,072.40, 6,108.80 and 2,128.40 is: 3,192.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,072.40 : 6,108.80 = 2,128.40 : x
  2. Step 2: Convert to fraction form
    4,072.40/6,108.80 = 2,128.40/x
  3. Step 3: Cross multiply
    4,072.40x = 6,108.80 × 2,128.40
  4. Step 4: Simplify right side
    4,072.40x = 13,001,969.92
  5. Step 5: Solve for x
    x = 13,001,969.92/4,072.40
  6. Step 6: Final answer
    x = 3,192.70

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1.5x scale

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.