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Finding the Fourth Proportional to 13,818.70, 20,683.95 and 10,902.70

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Solution

The fourth proportional to 13,818.70, 20,683.95 and 10,902.70 is: 16,319.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.70 : 20,683.95 = 10,902.70 : x
  2. Step 2: Convert to fraction form
    13,818.70/20,683.95 = 10,902.70/x
  3. Step 3: Cross multiply
    13,818.70x = 20,683.95 × 10,902.70
  4. Step 4: Simplify right side
    13,818.70x = 225,510,901.67
  5. Step 5: Solve for x
    x = 225,510,901.67/13,818.70
  6. Step 6: Final answer
    x = 16,319.26

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1.5x scale

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.