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Finding the Fourth Proportional to 13,187.68, 19,781.52 and 3,953.68

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Solution

The fourth proportional to 13,187.68, 19,781.52 and 3,953.68 is: 5,930.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.68 : 19,781.52 = 3,953.68 : x
  2. Step 2: Convert to fraction form
    13,187.68/19,781.52 = 3,953.68/x
  3. Step 3: Cross multiply
    13,187.68x = 19,781.52 × 3,953.68
  4. Step 4: Simplify right side
    13,187.68x = 78,209,799.99
  5. Step 5: Solve for x
    x = 78,209,799.99/13,187.68
  6. Step 6: Final answer
    x = 5,930.52

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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.