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Finding the Fourth Proportional to 39,113, 58,669.50 and 12,819.59

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Solution

The fourth proportional to 39,113, 58,669.50 and 12,819.59 is: 19,229.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,113 : 58,669.50 = 12,819.59 : x
  2. Step 2: Convert to fraction form
    39,113/58,669.50 = 12,819.59/x
  3. Step 3: Cross multiply
    39,113x = 58,669.50 × 12,819.59
  4. Step 4: Simplify right side
    39,113x = 752,118,935.51
  5. Step 5: Solve for x
    x = 752,118,935.51/39,113
  6. Step 6: Final answer
    x = 19,229.39

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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.