Home / 7,128.63-9,837.30-3,942.18

Finding the Fourth Proportional to 7,128.63, 9,837.30 and 3,942.18

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Solution

The fourth proportional to 7,128.63, 9,837.30 and 3,942.18 is: 5,440.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.63 : 9,837.30 = 3,942.18 : x
  2. Step 2: Convert to fraction form
    7,128.63/9,837.30 = 3,942.18/x
  3. Step 3: Cross multiply
    7,128.63x = 9,837.30 × 3,942.18
  4. Step 4: Simplify right side
    7,128.63x = 38,780,407.31
  5. Step 5: Solve for x
    x = 38,780,407.31/7,128.63
  6. Step 6: Final answer
    x = 5,440.09

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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.