Home / 28,261.84-39,000.20-15,687.44

Finding the Fourth Proportional to 28,261.84, 39,000.20 and 15,687.44

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Solution

The fourth proportional to 28,261.84, 39,000.20 and 15,687.44 is: 21,648.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,261.84 : 39,000.20 = 15,687.44 : x
  2. Step 2: Convert to fraction form
    28,261.84/39,000.20 = 15,687.44/x
  3. Step 3: Cross multiply
    28,261.84x = 39,000.20 × 15,687.44
  4. Step 4: Simplify right side
    28,261.84x = 611,813,297.49
  5. Step 5: Solve for x
    x = 611,813,297.49/28,261.84
  6. Step 6: Final answer
    x = 21,648.03

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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.