Home / 7,140.18-10,706.76-2,978.94

Finding the Fourth Proportional to 7,140.18, 10,706.76 and 2,978.94

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Solution

The fourth proportional to 7,140.18, 10,706.76 and 2,978.94 is: 4,466.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.18 : 10,706.76 = 2,978.94 : x
  2. Step 2: Convert to fraction form
    7,140.18/10,706.76 = 2,978.94/x
  3. Step 3: Cross multiply
    7,140.18x = 10,706.76 × 2,978.94
  4. Step 4: Simplify right side
    7,140.18x = 31,894,795.63
  5. Step 5: Solve for x
    x = 31,894,795.63/7,140.18
  6. Step 6: Final answer
    x = 4,466.95

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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.