Home / 10,128.57-15,192.78-3,203.07

Finding the Fourth Proportional to 10,128.57, 15,192.78 and 3,203.07

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Solution

The fourth proportional to 10,128.57, 15,192.78 and 3,203.07 is: 4,804.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.57 : 15,192.78 = 3,203.07 : x
  2. Step 2: Convert to fraction form
    10,128.57/15,192.78 = 3,203.07/x
  3. Step 3: Cross multiply
    10,128.57x = 15,192.78 × 3,203.07
  4. Step 4: Simplify right side
    10,128.57x = 48,663,537.83
  5. Step 5: Solve for x
    x = 48,663,537.83/10,128.57
  6. Step 6: Final answer
    x = 4,804.58

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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.