Home / 21,324.80-29,442.72-13,789.36

Finding the Fourth Proportional to 21,324.80, 29,442.72 and 13,789.36

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Solution

The fourth proportional to 21,324.80, 29,442.72 and 13,789.36 is: 19,038.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324.80 : 29,442.72 = 13,789.36 : x
  2. Step 2: Convert to fraction form
    21,324.80/29,442.72 = 13,789.36/x
  3. Step 3: Cross multiply
    21,324.80x = 29,442.72 × 13,789.36
  4. Step 4: Simplify right side
    21,324.80x = 405,996,265.46
  5. Step 5: Solve for x
    x = 405,996,265.46/21,324.80
  6. Step 6: Final answer
    x = 19,038.69

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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.