Home / 21,969.86-30,318.25-11,898.07

Finding the Fourth Proportional to 21,969.86, 30,318.25 and 11,898.07

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Solution

The fourth proportional to 21,969.86, 30,318.25 and 11,898.07 is: 16,419.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.86 : 30,318.25 = 11,898.07 : x
  2. Step 2: Convert to fraction form
    21,969.86/30,318.25 = 11,898.07/x
  3. Step 3: Cross multiply
    21,969.86x = 30,318.25 × 11,898.07
  4. Step 4: Simplify right side
    21,969.86x = 360,728,577.55
  5. Step 5: Solve for x
    x = 360,728,577.55/21,969.86
  6. Step 6: Final answer
    x = 16,419.25

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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.