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Finding the Fourth Proportional to 6,978.19, 9,622.05 and 5,381.23

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Solution

The fourth proportional to 6,978.19, 9,622.05 and 5,381.23 is: 7,420.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,978.19 : 9,622.05 = 5,381.23 : x
  2. Step 2: Convert to fraction form
    6,978.19/9,622.05 = 5,381.23/x
  3. Step 3: Cross multiply
    6,978.19x = 9,622.05 × 5,381.23
  4. Step 4: Simplify right side
    6,978.19x = 51,778,464.12
  5. Step 5: Solve for x
    x = 51,778,464.12/6,978.19
  6. Step 6: Final answer
    x = 7,420.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.