Home / 21,728.44-29,985.54-12,775.96

Finding the Fourth Proportional to 21,728.44, 29,985.54 and 12,775.96

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Solution

The fourth proportional to 21,728.44, 29,985.54 and 12,775.96 is: 17,631.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.44 : 29,985.54 = 12,775.96 : x
  2. Step 2: Convert to fraction form
    21,728.44/29,985.54 = 12,775.96/x
  3. Step 3: Cross multiply
    21,728.44x = 29,985.54 × 12,775.96
  4. Step 4: Simplify right side
    21,728.44x = 383,094,059.62
  5. Step 5: Solve for x
    x = 383,094,059.62/21,728.44
  6. Step 6: Final answer
    x = 17,631.00

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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.