Home / 13,860.10-19,129.26-7,890.94

Finding the Fourth Proportional to 13,860.10, 19,129.26 and 7,890.94

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Solution

The fourth proportional to 13,860.10, 19,129.26 and 7,890.94 is: 10,890.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,860.10 : 19,129.26 = 7,890.94 : x
  2. Step 2: Convert to fraction form
    13,860.10/19,129.26 = 7,890.94/x
  3. Step 3: Cross multiply
    13,860.10x = 19,129.26 × 7,890.94
  4. Step 4: Simplify right side
    13,860.10x = 150,947,747.26
  5. Step 5: Solve for x
    x = 150,947,747.26/13,860.10
  6. Step 6: Final answer
    x = 10,890.82

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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.