Home / 12,811.57-19,218.35-4,917.88

Finding the Fourth Proportional to 12,811.57, 19,218.35 and 4,917.88

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Solution

The fourth proportional to 12,811.57, 19,218.35 and 4,917.88 is: 7,377.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.57 : 19,218.35 = 4,917.88 : x
  2. Step 2: Convert to fraction form
    12,811.57/19,218.35 = 4,917.88/x
  3. Step 3: Cross multiply
    12,811.57x = 19,218.35 × 4,917.88
  4. Step 4: Simplify right side
    12,811.57x = 94,513,539.10
  5. Step 5: Solve for x
    x = 94,513,539.10/12,811.57
  6. Step 6: Final answer
    x = 7,377.20

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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.