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Finding the Fourth Proportional to 15,858.40, 23,787.60 and 13,669.60

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Solution

The fourth proportional to 15,858.40, 23,787.60 and 13,669.60 is: 20,504.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,858.40 : 23,787.60 = 13,669.60 : x
  2. Step 2: Convert to fraction form
    15,858.40/23,787.60 = 13,669.60/x
  3. Step 3: Cross multiply
    15,858.40x = 23,787.60 × 13,669.60
  4. Step 4: Simplify right side
    15,858.40x = 325,166,976.96
  5. Step 5: Solve for x
    x = 325,166,976.96/15,858.40
  6. Step 6: Final answer
    x = 20,504.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.