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Finding the Fourth Proportional to 30,639.74, 45,959.64 and 9,579.89

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Solution

The fourth proportional to 30,639.74, 45,959.64 and 9,579.89 is: 14,369.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,639.74 : 45,959.64 = 9,579.89 : x
  2. Step 2: Convert to fraction form
    30,639.74/45,959.64 = 9,579.89/x
  3. Step 3: Cross multiply
    30,639.74x = 45,959.64 × 9,579.89
  4. Step 4: Simplify right side
    30,639.74x = 440,288,295.64
  5. Step 5: Solve for x
    x = 440,288,295.64/30,639.74
  6. Step 6: Final answer
    x = 14,369.85

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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.