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Finding the Fourth Proportional to 39,309.53, 58,946.15 and 12,650.60

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Solution

The fourth proportional to 39,309.53, 58,946.15 and 12,650.60 is: 18,970.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,309.53 : 58,946.15 = 12,650.60 : x
  2. Step 2: Convert to fraction form
    39,309.53/58,946.15 = 12,650.60/x
  3. Step 3: Cross multiply
    39,309.53x = 58,946.15 × 12,650.60
  4. Step 4: Simplify right side
    39,309.53x = 745,704,344.18
  5. Step 5: Solve for x
    x = 745,704,344.18/39,309.53
  6. Step 6: Final answer
    x = 18,970.07

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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.