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Finding the Fourth Proportional to 28,096.98, 38,770.53 and 15,520.98

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Solution

The fourth proportional to 28,096.98, 38,770.53 and 15,520.98 is: 21,417.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,096.98 : 38,770.53 = 15,520.98 : x
  2. Step 2: Convert to fraction form
    28,096.98/38,770.53 = 15,520.98/x
  3. Step 3: Cross multiply
    28,096.98x = 38,770.53 × 15,520.98
  4. Step 4: Simplify right side
    28,096.98x = 601,756,620.72
  5. Step 5: Solve for x
    x = 601,756,620.72/28,096.98
  6. Step 6: Final answer
    x = 21,417.13

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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.