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Finding the Fourth Proportional to 10,938.70, 16,364.85 and 9,901.90

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Solution

The fourth proportional to 10,938.70, 16,364.85 and 9,901.90 is: 14,813.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,938.70 : 16,364.85 = 9,901.90 : x
  2. Step 2: Convert to fraction form
    10,938.70/16,364.85 = 9,901.90/x
  3. Step 3: Cross multiply
    10,938.70x = 16,364.85 × 9,901.90
  4. Step 4: Simplify right side
    10,938.70x = 162,043,108.22
  5. Step 5: Solve for x
    x = 162,043,108.22/10,938.70
  6. Step 6: Final answer
    x = 14,813.74

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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.