Home / 21,289.05-29,379.80-11,857.62

Finding the Fourth Proportional to 21,289.05, 29,379.80 and 11,857.62

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Solution

The fourth proportional to 21,289.05, 29,379.80 and 11,857.62 is: 16,364.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.05 : 29,379.80 = 11,857.62 : x
  2. Step 2: Convert to fraction form
    21,289.05/29,379.80 = 11,857.62/x
  3. Step 3: Cross multiply
    21,289.05x = 29,379.80 × 11,857.62
  4. Step 4: Simplify right side
    21,289.05x = 348,374,504.08
  5. Step 5: Solve for x
    x = 348,374,504.08/21,289.05
  6. Step 6: Final answer
    x = 16,364.02

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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.