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Finding the Fourth Proportional to 30,704.55, 45,947.48 and 21,300.45

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Solution

The fourth proportional to 30,704.55, 45,947.48 and 21,300.45 is: 31,874.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,704.55 : 45,947.48 = 21,300.45 : x
  2. Step 2: Convert to fraction form
    30,704.55/45,947.48 = 21,300.45/x
  3. Step 3: Cross multiply
    30,704.55x = 45,947.48 × 21,300.45
  4. Step 4: Simplify right side
    30,704.55x = 978,701,893.86
  5. Step 5: Solve for x
    x = 978,701,893.86/30,704.55
  6. Step 6: Final answer
    x = 31,874.82

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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.