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Finding the Fourth Proportional to 5,621.71, 8,389.80 and 4,998.94

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Solution

The fourth proportional to 5,621.71, 8,389.80 and 4,998.94 is: 7,460.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,621.71 : 8,389.80 = 4,998.94 : x
  2. Step 2: Convert to fraction form
    5,621.71/8,389.80 = 4,998.94/x
  3. Step 3: Cross multiply
    5,621.71x = 8,389.80 × 4,998.94
  4. Step 4: Simplify right side
    5,621.71x = 41,940,106.81
  5. Step 5: Solve for x
    x = 41,940,106.81/5,621.71
  6. Step 6: Final answer
    x = 7,460.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.