Home / 12,981.12-19,457.64-5,181.36

Finding the Fourth Proportional to 12,981.12, 19,457.64 and 5,181.36

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Solution

The fourth proportional to 12,981.12, 19,457.64 and 5,181.36 is: 7,766.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,981.12 : 19,457.64 = 5,181.36 : x
  2. Step 2: Convert to fraction form
    12,981.12/19,457.64 = 5,181.36/x
  3. Step 3: Cross multiply
    12,981.12x = 19,457.64 × 5,181.36
  4. Step 4: Simplify right side
    12,981.12x = 100,817,037.59
  5. Step 5: Solve for x
    x = 100,817,037.59/12,981.12
  6. Step 6: Final answer
    x = 7,766.44

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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.