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Finding the Fourth Proportional to 30,587.76, 45,881.82 and 8,400.60

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Solution

The fourth proportional to 30,587.76, 45,881.82 and 8,400.60 is: 12,600.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,587.76 : 45,881.82 = 8,400.60 : x
  2. Step 2: Convert to fraction form
    30,587.76/45,881.82 = 8,400.60/x
  3. Step 3: Cross multiply
    30,587.76x = 45,881.82 × 8,400.60
  4. Step 4: Simplify right side
    30,587.76x = 385,434,817.09
  5. Step 5: Solve for x
    x = 385,434,817.09/30,587.76
  6. Step 6: Final answer
    x = 12,600.95

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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.