Home / 13,890.90-19,169.67-7,841.46

Finding the Fourth Proportional to 13,890.90, 19,169.67 and 7,841.46

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Solution

The fourth proportional to 13,890.90, 19,169.67 and 7,841.46 is: 10,821.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.90 : 19,169.67 = 7,841.46 : x
  2. Step 2: Convert to fraction form
    13,890.90/19,169.67 = 7,841.46/x
  3. Step 3: Cross multiply
    13,890.90x = 19,169.67 × 7,841.46
  4. Step 4: Simplify right side
    13,890.90x = 150,318,200.52
  5. Step 5: Solve for x
    x = 150,318,200.52/13,890.90
  6. Step 6: Final answer
    x = 10,821.34

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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.