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Finding the Fourth Proportional to 7,989.71, 11,029.10 and 5,004.86

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Solution

The fourth proportional to 7,989.71, 11,029.10 and 5,004.86 is: 6,908.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.71 : 11,029.10 = 5,004.86 : x
  2. Step 2: Convert to fraction form
    7,989.71/11,029.10 = 5,004.86/x
  3. Step 3: Cross multiply
    7,989.71x = 11,029.10 × 5,004.86
  4. Step 4: Simplify right side
    7,989.71x = 55,199,021.26
  5. Step 5: Solve for x
    x = 55,199,021.26/7,989.71
  6. Step 6: Final answer
    x = 6,908.77

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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.