Home / 13,779.56-20,669.33-4,420.55

Finding the Fourth Proportional to 13,779.56, 20,669.33 and 4,420.55

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Solution

The fourth proportional to 13,779.56, 20,669.33 and 4,420.55 is: 6,630.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.56 : 20,669.33 = 4,420.55 : x
  2. Step 2: Convert to fraction form
    13,779.56/20,669.33 = 4,420.55/x
  3. Step 3: Cross multiply
    13,779.56x = 20,669.33 × 4,420.55
  4. Step 4: Simplify right side
    13,779.56x = 91,369,714.44
  5. Step 5: Solve for x
    x = 91,369,714.44/13,779.56
  6. Step 6: Final answer
    x = 6,630.82

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1.5x scale

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.