Home / 21,030.36-31,567.42-15,489.96

Finding the Fourth Proportional to 21,030.36, 31,567.42 and 15,489.96

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Solution

The fourth proportional to 21,030.36, 31,567.42 and 15,489.96 is: 23,251.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.36 : 31,567.42 = 15,489.96 : x
  2. Step 2: Convert to fraction form
    21,030.36/31,567.42 = 15,489.96/x
  3. Step 3: Cross multiply
    21,030.36x = 31,567.42 × 15,489.96
  4. Step 4: Simplify right side
    21,030.36x = 488,978,073.10
  5. Step 5: Solve for x
    x = 488,978,073.10/21,030.36
  6. Step 6: Final answer
    x = 23,251.06

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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.