Home / 28,576.19-39,435.31-15,829.78

Finding the Fourth Proportional to 28,576.19, 39,435.31 and 15,829.78

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Solution

The fourth proportional to 28,576.19, 39,435.31 and 15,829.78 is: 21,845.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,576.19 : 39,435.31 = 15,829.78 : x
  2. Step 2: Convert to fraction form
    28,576.19/39,435.31 = 15,829.78/x
  3. Step 3: Cross multiply
    28,576.19x = 39,435.31 × 15,829.78
  4. Step 4: Simplify right side
    28,576.19x = 624,252,281.53
  5. Step 5: Solve for x
    x = 624,252,281.53/28,576.19
  6. Step 6: Final answer
    x = 21,845.19

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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.