Home / 13,940.20-21,012.76-13,137.16

Finding the Fourth Proportional to 13,940.20, 21,012.76 and 13,137.16

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Solution

The fourth proportional to 13,940.20, 21,012.76 and 13,137.16 is: 19,802.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,940.20 : 21,012.76 = 13,137.16 : x
  2. Step 2: Convert to fraction form
    13,940.20/21,012.76 = 13,137.16/x
  3. Step 3: Cross multiply
    13,940.20x = 21,012.76 × 13,137.16
  4. Step 4: Simplify right side
    13,940.20x = 276,047,990.16
  5. Step 5: Solve for x
    x = 276,047,990.16/13,940.20
  6. Step 6: Final answer
    x = 19,802.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.