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Finding the Fourth Proportional to 30,373.50, 45,583.74 and 21,078.75

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Solution

The fourth proportional to 30,373.50, 45,583.74 and 21,078.75 is: 31,634.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,373.50 : 45,583.74 = 21,078.75 : x
  2. Step 2: Convert to fraction form
    30,373.50/45,583.74 = 21,078.75/x
  3. Step 3: Cross multiply
    30,373.50x = 45,583.74 × 21,078.75
  4. Step 4: Simplify right side
    30,373.50x = 960,848,259.53
  5. Step 5: Solve for x
    x = 960,848,259.53/30,373.50
  6. Step 6: Final answer
    x = 31,634.43

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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.