Home / 12,728.70-19,076.85-9,261.90

Finding the Fourth Proportional to 12,728.70, 19,076.85 and 9,261.90

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Solution

The fourth proportional to 12,728.70, 19,076.85 and 9,261.90 is: 13,881.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.70 : 19,076.85 = 9,261.90 : x
  2. Step 2: Convert to fraction form
    12,728.70/19,076.85 = 9,261.90/x
  3. Step 3: Cross multiply
    12,728.70x = 19,076.85 × 9,261.90
  4. Step 4: Simplify right side
    12,728.70x = 176,687,877.02
  5. Step 5: Solve for x
    x = 176,687,877.02/12,728.70
  6. Step 6: Final answer
    x = 13,881.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.