Home / 21,338.55-29,434.48-13,789.32

Finding the Fourth Proportional to 21,338.55, 29,434.48 and 13,789.32

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Solution

The fourth proportional to 21,338.55, 29,434.48 and 13,789.32 is: 19,021.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.55 : 29,434.48 = 13,789.32 : x
  2. Step 2: Convert to fraction form
    21,338.55/29,434.48 = 13,789.32/x
  3. Step 3: Cross multiply
    21,338.55x = 29,434.48 × 13,789.32
  4. Step 4: Simplify right side
    21,338.55x = 405,881,463.75
  5. Step 5: Solve for x
    x = 405,881,463.75/21,338.55
  6. Step 6: Final answer
    x = 19,021.04

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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.