Home / 21,285.54-29,377.62-12,338.64

Finding the Fourth Proportional to 21,285.54, 29,377.62 and 12,338.64

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Solution

The fourth proportional to 21,285.54, 29,377.62 and 12,338.64 is: 17,029.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.54 : 29,377.62 = 12,338.64 : x
  2. Step 2: Convert to fraction form
    21,285.54/29,377.62 = 12,338.64/x
  3. Step 3: Cross multiply
    21,285.54x = 29,377.62 × 12,338.64
  4. Step 4: Simplify right side
    21,285.54x = 362,479,877.24
  5. Step 5: Solve for x
    x = 362,479,877.24/21,285.54
  6. Step 6: Final answer
    x = 17,029.40

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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.