Home / 21,513.96-29,615.57-18,664.56

Finding the Fourth Proportional to 21,513.96, 29,615.57 and 18,664.56

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Solution

The fourth proportional to 21,513.96, 29,615.57 and 18,664.56 is: 25,693.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.96 : 29,615.57 = 18,664.56 : x
  2. Step 2: Convert to fraction form
    21,513.96/29,615.57 = 18,664.56/x
  3. Step 3: Cross multiply
    21,513.96x = 29,615.57 × 18,664.56
  4. Step 4: Simplify right side
    21,513.96x = 552,761,583.20
  5. Step 5: Solve for x
    x = 552,761,583.20/21,513.96
  6. Step 6: Final answer
    x = 25,693.16

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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.