Home / 13,940.13-19,236.72-7,890.65

Finding the Fourth Proportional to 13,940.13, 19,236.72 and 7,890.65

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Solution

The fourth proportional to 13,940.13, 19,236.72 and 7,890.65 is: 10,888.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,940.13 : 19,236.72 = 7,890.65 : x
  2. Step 2: Convert to fraction form
    13,940.13/19,236.72 = 7,890.65/x
  3. Step 3: Cross multiply
    13,940.13x = 19,236.72 × 7,890.65
  4. Step 4: Simplify right side
    13,940.13x = 151,790,230.21
  5. Step 5: Solve for x
    x = 151,790,230.21/13,940.13
  6. Step 6: Final answer
    x = 10,888.72

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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.