Home / 18,975.21-28,475.40-7,881.87

Finding the Fourth Proportional to 18,975.21, 28,475.40 and 7,881.87

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Solution

The fourth proportional to 18,975.21, 28,475.40 and 7,881.87 is: 11,828.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,975.21 : 28,475.40 = 7,881.87 : x
  2. Step 2: Convert to fraction form
    18,975.21/28,475.40 = 7,881.87/x
  3. Step 3: Cross multiply
    18,975.21x = 28,475.40 × 7,881.87
  4. Step 4: Simplify right side
    18,975.21x = 224,439,401.00
  5. Step 5: Solve for x
    x = 224,439,401.00/18,975.21
  6. Step 6: Final answer
    x = 11,828.03

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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.