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Finding the Fourth Proportional to 20,440.70, 28,200.93 and 13,366.70

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Solution

The fourth proportional to 20,440.70, 28,200.93 and 13,366.70 is: 18,441.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.70 : 28,200.93 = 13,366.70 : x
  2. Step 2: Convert to fraction form
    20,440.70/28,200.93 = 13,366.70/x
  3. Step 3: Cross multiply
    20,440.70x = 28,200.93 × 13,366.70
  4. Step 4: Simplify right side
    20,440.70x = 376,953,371.03
  5. Step 5: Solve for x
    x = 376,953,371.03/20,440.70
  6. Step 6: Final answer
    x = 18,441.31

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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.