Home / 5,118.50-7,677.84-1,420.74

Finding the Fourth Proportional to 5,118.50, 7,677.84 and 1,420.74

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Solution

The fourth proportional to 5,118.50, 7,677.84 and 1,420.74 is: 2,131.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.50 : 7,677.84 = 1,420.74 : x
  2. Step 2: Convert to fraction form
    5,118.50/7,677.84 = 1,420.74/x
  3. Step 3: Cross multiply
    5,118.50x = 7,677.84 × 1,420.74
  4. Step 4: Simplify right side
    5,118.50x = 10,908,214.40
  5. Step 5: Solve for x
    x = 10,908,214.40/5,118.50
  6. Step 6: Final answer
    x = 2,131.13

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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.