Home / 28,362.75-39,140.60-15,787.23

Finding the Fourth Proportional to 28,362.75, 39,140.60 and 15,787.23

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Solution

The fourth proportional to 28,362.75, 39,140.60 and 15,787.23 is: 21,786.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.75 : 39,140.60 = 15,787.23 : x
  2. Step 2: Convert to fraction form
    28,362.75/39,140.60 = 15,787.23/x
  3. Step 3: Cross multiply
    28,362.75x = 39,140.60 × 15,787.23
  4. Step 4: Simplify right side
    28,362.75x = 617,921,575.60
  5. Step 5: Solve for x
    x = 617,921,575.60/28,362.75
  6. Step 6: Final answer
    x = 21,786.38

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Double scale
Find fourth proportional to 28,363.75, 39,141.98 and 15,788.23
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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.