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Finding the Fourth Proportional to 28,603.42, 42,890.48 and 11,958.90

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Solution

The fourth proportional to 28,603.42, 42,890.48 and 11,958.90 is: 17,932.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,603.42 : 42,890.48 = 11,958.90 : x
  2. Step 2: Convert to fraction form
    28,603.42/42,890.48 = 11,958.90/x
  3. Step 3: Cross multiply
    28,603.42x = 42,890.48 × 11,958.90
  4. Step 4: Simplify right side
    28,603.42x = 512,922,961.27
  5. Step 5: Solve for x
    x = 512,922,961.27/28,603.42
  6. Step 6: Final answer
    x = 17,932.22

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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.