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Finding the Fourth Proportional to 15,270.84, 20,915.84 and 14,374.20

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Solution

The fourth proportional to 15,270.84, 20,915.84 and 14,374.20 is: 19,687.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,270.84 : 20,915.84 = 14,374.20 : x
  2. Step 2: Convert to fraction form
    15,270.84/20,915.84 = 14,374.20/x
  3. Step 3: Cross multiply
    15,270.84x = 20,915.84 × 14,374.20
  4. Step 4: Simplify right side
    15,270.84x = 300,648,467.33
  5. Step 5: Solve for x
    x = 300,648,467.33/15,270.84
  6. Step 6: Final answer
    x = 19,687.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.