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Finding the Fourth Proportional to 20,477, 28,237.38 and 19,286.60

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Solution

The fourth proportional to 20,477, 28,237.38 and 19,286.60 is: 26,595.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,477 : 28,237.38 = 19,286.60 : x
  2. Step 2: Convert to fraction form
    20,477/28,237.38 = 19,286.60/x
  3. Step 3: Cross multiply
    20,477x = 28,237.38 × 19,286.60
  4. Step 4: Simplify right side
    20,477x = 544,603,053.11
  5. Step 5: Solve for x
    x = 544,603,053.11/20,477
  6. Step 6: Final answer
    x = 26,595.84

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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.