Home / 13,239.30-18,267.48-7,861.56

Finding the Fourth Proportional to 13,239.30, 18,267.48 and 7,861.56

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Solution

The fourth proportional to 13,239.30, 18,267.48 and 7,861.56 is: 10,847.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.30 : 18,267.48 = 7,861.56 : x
  2. Step 2: Convert to fraction form
    13,239.30/18,267.48 = 7,861.56/x
  3. Step 3: Cross multiply
    13,239.30x = 18,267.48 × 7,861.56
  4. Step 4: Simplify right side
    13,239.30x = 143,610,890.07
  5. Step 5: Solve for x
    x = 143,610,890.07/13,239.30
  6. Step 6: Final answer
    x = 10,847.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.