Home / 19,830.20-29,705.64-11,928.35

Finding the Fourth Proportional to 19,830.20, 29,705.64 and 11,928.35

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Solution

The fourth proportional to 19,830.20, 29,705.64 and 11,928.35 is: 17,868.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,830.20 : 29,705.64 = 11,928.35 : x
  2. Step 2: Convert to fraction form
    19,830.20/29,705.64 = 11,928.35/x
  3. Step 3: Cross multiply
    19,830.20x = 29,705.64 × 11,928.35
  4. Step 4: Simplify right side
    19,830.20x = 354,339,270.89
  5. Step 5: Solve for x
    x = 354,339,270.89/19,830.20
  6. Step 6: Final answer
    x = 17,868.67

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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.