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Finding the Fourth Proportional to 8,989.79, 13,416.03 and 8,005.64

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Solution

The fourth proportional to 8,989.79, 13,416.03 and 8,005.64 is: 11,947.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.79 : 13,416.03 = 8,005.64 : x
  2. Step 2: Convert to fraction form
    8,989.79/13,416.03 = 8,005.64/x
  3. Step 3: Cross multiply
    8,989.79x = 13,416.03 × 8,005.64
  4. Step 4: Simplify right side
    8,989.79x = 107,403,839.33
  5. Step 5: Solve for x
    x = 107,403,839.33/8,989.79
  6. Step 6: Final answer
    x = 11,947.32

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1.5x scale

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.