Home / 13,639.31-20,458.96-11,784.81

Finding the Fourth Proportional to 13,639.31, 20,458.96 and 11,784.81

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Solution

The fourth proportional to 13,639.31, 20,458.96 and 11,784.81 is: 17,677.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.31 : 20,458.96 = 11,784.81 : x
  2. Step 2: Convert to fraction form
    13,639.31/20,458.96 = 11,784.81/x
  3. Step 3: Cross multiply
    13,639.31x = 20,458.96 × 11,784.81
  4. Step 4: Simplify right side
    13,639.31x = 241,104,926.94
  5. Step 5: Solve for x
    x = 241,104,926.94/13,639.31
  6. Step 6: Final answer
    x = 17,677.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.