Home / 7,721.81-10,650.47-4,889.64

Finding the Fourth Proportional to 7,721.81, 10,650.47 and 4,889.64

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Solution

The fourth proportional to 7,721.81, 10,650.47 and 4,889.64 is: 6,744.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.81 : 10,650.47 = 4,889.64 : x
  2. Step 2: Convert to fraction form
    7,721.81/10,650.47 = 4,889.64/x
  3. Step 3: Cross multiply
    7,721.81x = 10,650.47 × 4,889.64
  4. Step 4: Simplify right side
    7,721.81x = 52,076,939.68
  5. Step 5: Solve for x
    x = 52,076,939.68/7,721.81
  6. Step 6: Final answer
    x = 6,744.14

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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.