Home / 21,731.04-29,990.32-12,299.60

Finding the Fourth Proportional to 21,731.04, 29,990.32 and 12,299.60

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Solution

The fourth proportional to 21,731.04, 29,990.32 and 12,299.60 is: 16,974.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,731.04 : 29,990.32 = 12,299.60 : x
  2. Step 2: Convert to fraction form
    21,731.04/29,990.32 = 12,299.60/x
  3. Step 3: Cross multiply
    21,731.04x = 29,990.32 × 12,299.60
  4. Step 4: Simplify right side
    21,731.04x = 368,868,939.87
  5. Step 5: Solve for x
    x = 368,868,939.87/21,731.04
  6. Step 6: Final answer
    x = 16,974.29

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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.