Home / 19,678.21-27,140.57-12,605.29

Finding the Fourth Proportional to 19,678.21, 27,140.57 and 12,605.29

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Solution

The fourth proportional to 19,678.21, 27,140.57 and 12,605.29 is: 17,385.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,678.21 : 27,140.57 = 12,605.29 : x
  2. Step 2: Convert to fraction form
    19,678.21/27,140.57 = 12,605.29/x
  3. Step 3: Cross multiply
    19,678.21x = 27,140.57 × 12,605.29
  4. Step 4: Simplify right side
    19,678.21x = 342,114,672.01
  5. Step 5: Solve for x
    x = 342,114,672.01/19,678.21
  6. Step 6: Final answer
    x = 17,385.46

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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.