Home / 19,964.09-27,563.29-12,420.70

Finding the Fourth Proportional to 19,964.09, 27,563.29 and 12,420.70

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Solution

The fourth proportional to 19,964.09, 27,563.29 and 12,420.70 is: 17,148.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,964.09 : 27,563.29 = 12,420.70 : x
  2. Step 2: Convert to fraction form
    19,964.09/27,563.29 = 12,420.70/x
  3. Step 3: Cross multiply
    19,964.09x = 27,563.29 × 12,420.70
  4. Step 4: Simplify right side
    19,964.09x = 342,355,256.14
  5. Step 5: Solve for x
    x = 342,355,256.14/19,964.09
  6. Step 6: Final answer
    x = 17,148.55

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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.