Home / 13,839.41-19,089.86-9,861.80

Finding the Fourth Proportional to 13,839.41, 19,089.86 and 9,861.80

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Solution

The fourth proportional to 13,839.41, 19,089.86 and 9,861.80 is: 13,603.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,839.41 : 19,089.86 = 9,861.80 : x
  2. Step 2: Convert to fraction form
    13,839.41/19,089.86 = 9,861.80/x
  3. Step 3: Cross multiply
    13,839.41x = 19,089.86 × 9,861.80
  4. Step 4: Simplify right side
    13,839.41x = 188,260,379.76
  5. Step 5: Solve for x
    x = 188,260,379.76/13,839.41
  6. Step 6: Final answer
    x = 13,603.21

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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.