Home / 28,361.31-39,135.78-16,428.48

Finding the Fourth Proportional to 28,361.31, 39,135.78 and 16,428.48

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Solution

The fourth proportional to 28,361.31, 39,135.78 and 16,428.48 is: 22,669.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,361.31 : 39,135.78 = 16,428.48 : x
  2. Step 2: Convert to fraction form
    28,361.31/39,135.78 = 16,428.48/x
  3. Step 3: Cross multiply
    28,361.31x = 39,135.78 × 16,428.48
  4. Step 4: Simplify right side
    28,361.31x = 642,941,379.01
  5. Step 5: Solve for x
    x = 642,941,379.01/28,361.31
  6. Step 6: Final answer
    x = 22,669.66

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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.