Home / 13,145.72-19,720.98-4,379.80

Finding the Fourth Proportional to 13,145.72, 19,720.98 and 4,379.80

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Solution

The fourth proportional to 13,145.72, 19,720.98 and 4,379.80 is: 6,570.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.72 : 19,720.98 = 4,379.80 : x
  2. Step 2: Convert to fraction form
    13,145.72/19,720.98 = 4,379.80/x
  3. Step 3: Cross multiply
    13,145.72x = 19,720.98 × 4,379.80
  4. Step 4: Simplify right side
    13,145.72x = 86,373,948.20
  5. Step 5: Solve for x
    x = 86,373,948.20/13,145.72
  6. Step 6: Final answer
    x = 6,570.50

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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.