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Finding the Fourth Proportional to 5,918.76, 8,881.20 and 3,838.20

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Solution

The fourth proportional to 5,918.76, 8,881.20 and 3,838.20 is: 5,759.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,918.76 : 8,881.20 = 3,838.20 : x
  2. Step 2: Convert to fraction form
    5,918.76/8,881.20 = 3,838.20/x
  3. Step 3: Cross multiply
    5,918.76x = 8,881.20 × 3,838.20
  4. Step 4: Simplify right side
    5,918.76x = 34,087,821.84
  5. Step 5: Solve for x
    x = 34,087,821.84/5,918.76
  6. Step 6: Final answer
    x = 5,759.28

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1.5x scale

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.