Home / 21,231.64-29,301.40-13,693.66

Finding the Fourth Proportional to 21,231.64, 29,301.40 and 13,693.66

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Solution

The fourth proportional to 21,231.64, 29,301.40 and 13,693.66 is: 18,898.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.64 : 29,301.40 = 13,693.66 : x
  2. Step 2: Convert to fraction form
    21,231.64/29,301.40 = 13,693.66/x
  3. Step 3: Cross multiply
    21,231.64x = 29,301.40 × 13,693.66
  4. Step 4: Simplify right side
    21,231.64x = 401,243,409.12
  5. Step 5: Solve for x
    x = 401,243,409.12/21,231.64
  6. Step 6: Final answer
    x = 18,898.37

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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.