Home / 21,121.02-29,147.43-12,631.89

Finding the Fourth Proportional to 21,121.02, 29,147.43 and 12,631.89

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Solution

The fourth proportional to 21,121.02, 29,147.43 and 12,631.89 is: 17,432.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.02 : 29,147.43 = 12,631.89 : x
  2. Step 2: Convert to fraction form
    21,121.02/29,147.43 = 12,631.89/x
  3. Step 3: Cross multiply
    21,121.02x = 29,147.43 × 12,631.89
  4. Step 4: Simplify right side
    21,121.02x = 368,187,129.54
  5. Step 5: Solve for x
    x = 368,187,129.54/21,121.02
  6. Step 6: Final answer
    x = 17,432.26

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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.