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Finding the Fourth Proportional to 6,389.71, 8,817.39 and 3,556.93

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Solution

The fourth proportional to 6,389.71, 8,817.39 and 3,556.93 is: 4,908.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,389.71 : 8,817.39 = 3,556.93 : x
  2. Step 2: Convert to fraction form
    6,389.71/8,817.39 = 3,556.93/x
  3. Step 3: Cross multiply
    6,389.71x = 8,817.39 × 3,556.93
  4. Step 4: Simplify right side
    6,389.71x = 31,362,839.01
  5. Step 5: Solve for x
    x = 31,362,839.01/6,389.71
  6. Step 6: Final answer
    x = 4,908.34

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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.