Home / 6,877.20-9,487.84-4,220

Finding the Fourth Proportional to 6,877.20, 9,487.84 and 4,220

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Solution

The fourth proportional to 6,877.20, 9,487.84 and 4,220 is: 5,821.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,877.20 : 9,487.84 = 4,220 : x
  2. Step 2: Convert to fraction form
    6,877.20/9,487.84 = 4,220/x
  3. Step 3: Cross multiply
    6,877.20x = 9,487.84 × 4,220
  4. Step 4: Simplify right side
    6,877.20x = 40,038,684.80
  5. Step 5: Solve for x
    x = 40,038,684.80/6,877.20
  6. Step 6: Final answer
    x = 5,821.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.