Home / 25,787.14-38,688.03-12,643.30

Finding the Fourth Proportional to 25,787.14, 38,688.03 and 12,643.30

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Solution

The fourth proportional to 25,787.14, 38,688.03 and 12,643.30 is: 18,968.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,787.14 : 38,688.03 = 12,643.30 : x
  2. Step 2: Convert to fraction form
    25,787.14/38,688.03 = 12,643.30/x
  3. Step 3: Cross multiply
    25,787.14x = 38,688.03 × 12,643.30
  4. Step 4: Simplify right side
    25,787.14x = 489,144,369.70
  5. Step 5: Solve for x
    x = 489,144,369.70/25,787.14
  6. Step 6: Final answer
    x = 18,968.54

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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.