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Finding the Fourth Proportional to 30,265.56, 45,390.96 and 9,489.06

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Solution

The fourth proportional to 30,265.56, 45,390.96 and 9,489.06 is: 14,231.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,265.56 : 45,390.96 = 9,489.06 : x
  2. Step 2: Convert to fraction form
    30,265.56/45,390.96 = 9,489.06/x
  3. Step 3: Cross multiply
    30,265.56x = 45,390.96 × 9,489.06
  4. Step 4: Simplify right side
    30,265.56x = 430,717,542.90
  5. Step 5: Solve for x
    x = 430,717,542.90/30,265.56
  6. Step 6: Final answer
    x = 14,231.28

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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.