Home / 6,420.72-8,860.98-4,432.20

Finding the Fourth Proportional to 6,420.72, 8,860.98 and 4,432.20

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Solution

The fourth proportional to 6,420.72, 8,860.98 and 4,432.20 is: 6,116.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.72 : 8,860.98 = 4,432.20 : x
  2. Step 2: Convert to fraction form
    6,420.72/8,860.98 = 4,432.20/x
  3. Step 3: Cross multiply
    6,420.72x = 8,860.98 × 4,432.20
  4. Step 4: Simplify right side
    6,420.72x = 39,273,635.56
  5. Step 5: Solve for x
    x = 39,273,635.56/6,420.72
  6. Step 6: Final answer
    x = 6,116.70

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1.5x scale

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.