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Finding the Fourth Proportional to 11,765, 16,235.80 and 6,459.68

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Solution

The fourth proportional to 11,765, 16,235.80 and 6,459.68 is: 8,914.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,765 : 16,235.80 = 6,459.68 : x
  2. Step 2: Convert to fraction form
    11,765/16,235.80 = 6,459.68/x
  3. Step 3: Cross multiply
    11,765x = 16,235.80 × 6,459.68
  4. Step 4: Simplify right side
    11,765x = 104,878,072.54
  5. Step 5: Solve for x
    x = 104,878,072.54/11,765
  6. Step 6: Final answer
    x = 8,914.41

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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.