Home / 21,139.44-31,707.30-12,816.99

Finding the Fourth Proportional to 21,139.44, 31,707.30 and 12,816.99

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Solution

The fourth proportional to 21,139.44, 31,707.30 and 12,816.99 is: 19,224.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.44 : 31,707.30 = 12,816.99 : x
  2. Step 2: Convert to fraction form
    21,139.44/31,707.30 = 12,816.99/x
  3. Step 3: Cross multiply
    21,139.44x = 31,707.30 × 12,816.99
  4. Step 4: Simplify right side
    21,139.44x = 406,392,147.03
  5. Step 5: Solve for x
    x = 406,392,147.03/21,139.44
  6. Step 6: Final answer
    x = 19,224.36

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1.5x scale

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.