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Finding the Fourth Proportional to 39,187.68, 58,788.84 and 12,910.92

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Solution

The fourth proportional to 39,187.68, 58,788.84 and 12,910.92 is: 19,368.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,187.68 : 58,788.84 = 12,910.92 : x
  2. Step 2: Convert to fraction form
    39,187.68/58,788.84 = 12,910.92/x
  3. Step 3: Cross multiply
    39,187.68x = 58,788.84 × 12,910.92
  4. Step 4: Simplify right side
    39,187.68x = 759,018,010.13
  5. Step 5: Solve for x
    x = 759,018,010.13/39,187.68
  6. Step 6: Final answer
    x = 19,368.79

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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.