Home / 7,140.05-10,702.43-2,978.98

Finding the Fourth Proportional to 7,140.05, 10,702.43 and 2,978.98

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Solution

The fourth proportional to 7,140.05, 10,702.43 and 2,978.98 is: 4,465.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.05 : 10,702.43 = 2,978.98 : x
  2. Step 2: Convert to fraction form
    7,140.05/10,702.43 = 2,978.98/x
  3. Step 3: Cross multiply
    7,140.05x = 10,702.43 × 2,978.98
  4. Step 4: Simplify right side
    7,140.05x = 31,882,294.44
  5. Step 5: Solve for x
    x = 31,882,294.44/7,140.05
  6. Step 6: Final answer
    x = 4,465.28

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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.