Home / 15,811.39-21,815.96-9,839.87

Finding the Fourth Proportional to 15,811.39, 21,815.96 and 9,839.87

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Solution

The fourth proportional to 15,811.39, 21,815.96 and 9,839.87 is: 13,576.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.39 : 21,815.96 = 9,839.87 : x
  2. Step 2: Convert to fraction form
    15,811.39/21,815.96 = 9,839.87/x
  3. Step 3: Cross multiply
    15,811.39x = 21,815.96 × 9,839.87
  4. Step 4: Simplify right side
    15,811.39x = 214,666,210.33
  5. Step 5: Solve for x
    x = 214,666,210.33/15,811.39
  6. Step 6: Final answer
    x = 13,576.68

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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.