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Finding the Fourth Proportional to 20,497.68, 28,267.44 and 18,970.44

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Solution

The fourth proportional to 20,497.68, 28,267.44 and 18,970.44 is: 26,161.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,497.68 : 28,267.44 = 18,970.44 : x
  2. Step 2: Convert to fraction form
    20,497.68/28,267.44 = 18,970.44/x
  3. Step 3: Cross multiply
    20,497.68x = 28,267.44 × 18,970.44
  4. Step 4: Simplify right side
    20,497.68x = 536,245,774.47
  5. Step 5: Solve for x
    x = 536,245,774.47/20,497.68
  6. Step 6: Final answer
    x = 26,161.29

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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.