Home / 15,220.17-21,003.78-8,505.79

Finding the Fourth Proportional to 15,220.17, 21,003.78 and 8,505.79

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Solution

The fourth proportional to 15,220.17, 21,003.78 and 8,505.79 is: 11,737.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.17 : 21,003.78 = 8,505.79 : x
  2. Step 2: Convert to fraction form
    15,220.17/21,003.78 = 8,505.79/x
  3. Step 3: Cross multiply
    15,220.17x = 21,003.78 × 8,505.79
  4. Step 4: Simplify right side
    15,220.17x = 178,653,741.89
  5. Step 5: Solve for x
    x = 178,653,741.89/15,220.17
  6. Step 6: Final answer
    x = 11,737.96

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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.