Home / 7,870.18-11,805.28-2,603.78

Finding the Fourth Proportional to 7,870.18, 11,805.28 and 2,603.78

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Solution

The fourth proportional to 7,870.18, 11,805.28 and 2,603.78 is: 3,905.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,870.18 : 11,805.28 = 2,603.78 : x
  2. Step 2: Convert to fraction form
    7,870.18/11,805.28 = 2,603.78/x
  3. Step 3: Cross multiply
    7,870.18x = 11,805.28 × 2,603.78
  4. Step 4: Simplify right side
    7,870.18x = 30,738,351.96
  5. Step 5: Solve for x
    x = 30,738,351.96/7,870.18
  6. Step 6: Final answer
    x = 3,905.67

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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.