Home / 21,969.93-30,318.60-11,898.39

Finding the Fourth Proportional to 21,969.93, 30,318.60 and 11,898.39

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Solution

The fourth proportional to 21,969.93, 30,318.60 and 11,898.39 is: 16,419.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.93 : 30,318.60 = 11,898.39 : x
  2. Step 2: Convert to fraction form
    21,969.93/30,318.60 = 11,898.39/x
  3. Step 3: Cross multiply
    21,969.93x = 30,318.60 × 11,898.39
  4. Step 4: Simplify right side
    21,969.93x = 360,742,685.37
  5. Step 5: Solve for x
    x = 360,742,685.37/21,969.93
  6. Step 6: Final answer
    x = 16,419.83

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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.