Home / 21,285.24-29,370.56-12,331.09

Finding the Fourth Proportional to 21,285.24, 29,370.56 and 12,331.09

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Solution

The fourth proportional to 21,285.24, 29,370.56 and 12,331.09 is: 17,015.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.24 : 29,370.56 = 12,331.09 : x
  2. Step 2: Convert to fraction form
    21,285.24/29,370.56 = 12,331.09/x
  3. Step 3: Cross multiply
    21,285.24x = 29,370.56 × 12,331.09
  4. Step 4: Simplify right side
    21,285.24x = 362,170,957.05
  5. Step 5: Solve for x
    x = 362,170,957.05/21,285.24
  6. Step 6: Final answer
    x = 17,015.13

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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.