Home / 21,969.63-30,318.10-11,898.16

Finding the Fourth Proportional to 21,969.63, 30,318.10 and 11,898.16

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Solution

The fourth proportional to 21,969.63, 30,318.10 and 11,898.16 is: 16,419.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.63 : 30,318.10 = 11,898.16 : x
  2. Step 2: Convert to fraction form
    21,969.63/30,318.10 = 11,898.16/x
  3. Step 3: Cross multiply
    21,969.63x = 30,318.10 × 11,898.16
  4. Step 4: Simplify right side
    21,969.63x = 360,729,499.16
  5. Step 5: Solve for x
    x = 360,729,499.16/21,969.63
  6. Step 6: Final answer
    x = 16,419.46

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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.