Home / 13,623.87-20,428.40-4,259.85

Finding the Fourth Proportional to 13,623.87, 20,428.40 and 4,259.85

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Solution

The fourth proportional to 13,623.87, 20,428.40 and 4,259.85 is: 6,387.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,623.87 : 20,428.40 = 4,259.85 : x
  2. Step 2: Convert to fraction form
    13,623.87/20,428.40 = 4,259.85/x
  3. Step 3: Cross multiply
    13,623.87x = 20,428.40 × 4,259.85
  4. Step 4: Simplify right side
    13,623.87x = 87,021,898.44
  5. Step 5: Solve for x
    x = 87,021,898.44/13,623.87
  6. Step 6: Final answer
    x = 6,387.46

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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.