Home / 13,840.53-19,099.84-7,872.21

Finding the Fourth Proportional to 13,840.53, 19,099.84 and 7,872.21

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Solution

The fourth proportional to 13,840.53, 19,099.84 and 7,872.21 is: 10,863.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.53 : 19,099.84 = 7,872.21 : x
  2. Step 2: Convert to fraction form
    13,840.53/19,099.84 = 7,872.21/x
  3. Step 3: Cross multiply
    13,840.53x = 19,099.84 × 7,872.21
  4. Step 4: Simplify right side
    13,840.53x = 150,357,951.45
  5. Step 5: Solve for x
    x = 150,357,951.45/13,840.53
  6. Step 6: Final answer
    x = 10,863.60

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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.