Home / 13,561.40-20,354.10-8,007.80

Finding the Fourth Proportional to 13,561.40, 20,354.10 and 8,007.80

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Solution

The fourth proportional to 13,561.40, 20,354.10 and 8,007.80 is: 12,018.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,561.40 : 20,354.10 = 8,007.80 : x
  2. Step 2: Convert to fraction form
    13,561.40/20,354.10 = 8,007.80/x
  3. Step 3: Cross multiply
    13,561.40x = 20,354.10 × 8,007.80
  4. Step 4: Simplify right side
    13,561.40x = 162,991,561.98
  5. Step 5: Solve for x
    x = 162,991,561.98/13,561.40
  6. Step 6: Final answer
    x = 12,018.79

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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.