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Finding the Fourth Proportional to 30,612.58, 45,919.38 and 8,425.82

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Solution

The fourth proportional to 30,612.58, 45,919.38 and 8,425.82 is: 12,638.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,612.58 : 45,919.38 = 8,425.82 : x
  2. Step 2: Convert to fraction form
    30,612.58/45,919.38 = 8,425.82/x
  3. Step 3: Cross multiply
    30,612.58x = 45,919.38 × 8,425.82
  4. Step 4: Simplify right side
    30,612.58x = 386,908,430.39
  5. Step 5: Solve for x
    x = 386,908,430.39/30,612.58
  6. Step 6: Final answer
    x = 12,638.87

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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.