Home / 21,722.07-29,984.18-13,220.31

Finding the Fourth Proportional to 21,722.07, 29,984.18 and 13,220.31

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Solution

The fourth proportional to 21,722.07, 29,984.18 and 13,220.31 is: 18,248.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,722.07 : 29,984.18 = 13,220.31 : x
  2. Step 2: Convert to fraction form
    21,722.07/29,984.18 = 13,220.31/x
  3. Step 3: Cross multiply
    21,722.07x = 29,984.18 × 13,220.31
  4. Step 4: Simplify right side
    21,722.07x = 396,400,088.59
  5. Step 5: Solve for x
    x = 396,400,088.59/21,722.07
  6. Step 6: Final answer
    x = 18,248.73

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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.