Home / 21,358.56-31,991.04-17,618.64

Finding the Fourth Proportional to 21,358.56, 31,991.04 and 17,618.64

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Solution

The fourth proportional to 21,358.56, 31,991.04 and 17,618.64 is: 26,389.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,358.56 : 31,991.04 = 17,618.64 : x
  2. Step 2: Convert to fraction form
    21,358.56/31,991.04 = 17,618.64/x
  3. Step 3: Cross multiply
    21,358.56x = 31,991.04 × 17,618.64
  4. Step 4: Simplify right side
    21,358.56x = 563,638,616.99
  5. Step 5: Solve for x
    x = 563,638,616.99/21,358.56
  6. Step 6: Final answer
    x = 26,389.35

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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.