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Finding the Fourth Proportional to 28,204.50, 38,923.02 and 15,630.06

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Solution

The fourth proportional to 28,204.50, 38,923.02 and 15,630.06 is: 21,569.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,204.50 : 38,923.02 = 15,630.06 : x
  2. Step 2: Convert to fraction form
    28,204.50/38,923.02 = 15,630.06/x
  3. Step 3: Cross multiply
    28,204.50x = 38,923.02 × 15,630.06
  4. Step 4: Simplify right side
    28,204.50x = 608,369,137.98
  5. Step 5: Solve for x
    x = 608,369,137.98/28,204.50
  6. Step 6: Final answer
    x = 21,569.93

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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.