Home / 28,362.75-39,140.78-15,787.59

Finding the Fourth Proportional to 28,362.75, 39,140.78 and 15,787.59

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Solution

The fourth proportional to 28,362.75, 39,140.78 and 15,787.59 is: 21,786.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.75 : 39,140.78 = 15,787.59 : x
  2. Step 2: Convert to fraction form
    28,362.75/39,140.78 = 15,787.59/x
  3. Step 3: Cross multiply
    28,362.75x = 39,140.78 × 15,787.59
  4. Step 4: Simplify right side
    28,362.75x = 617,938,507.98
  5. Step 5: Solve for x
    x = 617,938,507.98/28,362.75
  6. Step 6: Final answer
    x = 21,786.97

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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.