Home / 21,004.74-28,986.63-11,573.30

Finding the Fourth Proportional to 21,004.74, 28,986.63 and 11,573.30

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Solution

The fourth proportional to 21,004.74, 28,986.63 and 11,573.30 is: 15,971.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.74 : 28,986.63 = 11,573.30 : x
  2. Step 2: Convert to fraction form
    21,004.74/28,986.63 = 11,573.30/x
  3. Step 3: Cross multiply
    21,004.74x = 28,986.63 × 11,573.30
  4. Step 4: Simplify right side
    21,004.74x = 335,471,037.45
  5. Step 5: Solve for x
    x = 335,471,037.45/21,004.74
  6. Step 6: Final answer
    x = 15,971.21

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1.5x scale

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.