Home / 5,118.49-7,677.70-1,420.77

Finding the Fourth Proportional to 5,118.49, 7,677.70 and 1,420.77

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Solution

The fourth proportional to 5,118.49, 7,677.70 and 1,420.77 is: 2,131.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.49 : 7,677.70 = 1,420.77 : x
  2. Step 2: Convert to fraction form
    5,118.49/7,677.70 = 1,420.77/x
  3. Step 3: Cross multiply
    5,118.49x = 7,677.70 × 1,420.77
  4. Step 4: Simplify right side
    5,118.49x = 10,908,238.73
  5. Step 5: Solve for x
    x = 10,908,238.73/5,118.49
  6. Step 6: Final answer
    x = 2,131.14

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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.