Home / 19,721.28-27,214.20-11,222.22

Finding the Fourth Proportional to 19,721.28, 27,214.20 and 11,222.22

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Solution

The fourth proportional to 19,721.28, 27,214.20 and 11,222.22 is: 15,486.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,721.28 : 27,214.20 = 11,222.22 : x
  2. Step 2: Convert to fraction form
    19,721.28/27,214.20 = 11,222.22/x
  3. Step 3: Cross multiply
    19,721.28x = 27,214.20 × 11,222.22
  4. Step 4: Simplify right side
    19,721.28x = 305,403,739.52
  5. Step 5: Solve for x
    x = 305,403,739.52/19,721.28
  6. Step 6: Final answer
    x = 15,486.00

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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.