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Finding the Fourth Proportional to 20,697.92, 28,603.68 and 18,393.92

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Solution

The fourth proportional to 20,697.92, 28,603.68 and 18,393.92 is: 25,419.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.92 : 28,603.68 = 18,393.92 : x
  2. Step 2: Convert to fraction form
    20,697.92/28,603.68 = 18,393.92/x
  3. Step 3: Cross multiply
    20,697.92x = 28,603.68 × 18,393.92
  4. Step 4: Simplify right side
    20,697.92x = 526,133,801.63
  5. Step 5: Solve for x
    x = 526,133,801.63/20,697.92
  6. Step 6: Final answer
    x = 25,419.65

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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.