Home / 21,048.38-31,564.32-7,893.58

Finding the Fourth Proportional to 21,048.38, 31,564.32 and 7,893.58

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Solution

The fourth proportional to 21,048.38, 31,564.32 and 7,893.58 is: 11,837.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,048.38 : 31,564.32 = 7,893.58 : x
  2. Step 2: Convert to fraction form
    21,048.38/31,564.32 = 7,893.58/x
  3. Step 3: Cross multiply
    21,048.38x = 31,564.32 × 7,893.58
  4. Step 4: Simplify right side
    21,048.38x = 249,155,485.07
  5. Step 5: Solve for x
    x = 249,155,485.07/21,048.38
  6. Step 6: Final answer
    x = 11,837.28

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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.