Home / 13,779.18-20,669.82-4,290.30

Finding the Fourth Proportional to 13,779.18, 20,669.82 and 4,290.30

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Solution

The fourth proportional to 13,779.18, 20,669.82 and 4,290.30 is: 6,435.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.18 : 20,669.82 = 4,290.30 : x
  2. Step 2: Convert to fraction form
    13,779.18/20,669.82 = 4,290.30/x
  3. Step 3: Cross multiply
    13,779.18x = 20,669.82 × 4,290.30
  4. Step 4: Simplify right side
    13,779.18x = 88,679,728.75
  5. Step 5: Solve for x
    x = 88,679,728.75/13,779.18
  6. Step 6: Final answer
    x = 6,435.78

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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.