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Finding the Fourth Proportional to 28,157.05, 38,852.89 and 16,824.15

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Solution

The fourth proportional to 28,157.05, 38,852.89 and 16,824.15 is: 23,215.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157.05 : 38,852.89 = 16,824.15 : x
  2. Step 2: Convert to fraction form
    28,157.05/38,852.89 = 16,824.15/x
  3. Step 3: Cross multiply
    28,157.05x = 38,852.89 × 16,824.15
  4. Step 4: Simplify right side
    28,157.05x = 653,666,765.17
  5. Step 5: Solve for x
    x = 653,666,765.17/28,157.05
  6. Step 6: Final answer
    x = 23,215.03

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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.