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Finding the Fourth Proportional to 30,451.90, 45,685.73 and 9,391.47

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Solution

The fourth proportional to 30,451.90, 45,685.73 and 9,391.47 is: 14,089.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,451.90 : 45,685.73 = 9,391.47 : x
  2. Step 2: Convert to fraction form
    30,451.90/45,685.73 = 9,391.47/x
  3. Step 3: Cross multiply
    30,451.90x = 45,685.73 × 9,391.47
  4. Step 4: Simplify right side
    30,451.90x = 429,056,201.43
  5. Step 5: Solve for x
    x = 429,056,201.43/30,451.90
  6. Step 6: Final answer
    x = 14,089.64

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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.