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Finding the Fourth Proportional to 11,913.21, 16,440.03 and 6,607.80

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Solution

The fourth proportional to 11,913.21, 16,440.03 and 6,607.80 is: 9,118.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,913.21 : 16,440.03 = 6,607.80 : x
  2. Step 2: Convert to fraction form
    11,913.21/16,440.03 = 6,607.80/x
  3. Step 3: Cross multiply
    11,913.21x = 16,440.03 × 6,607.80
  4. Step 4: Simplify right side
    11,913.21x = 108,632,430.23
  5. Step 5: Solve for x
    x = 108,632,430.23/11,913.21
  6. Step 6: Final answer
    x = 9,118.65

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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.