Home / 21,928.07-30,260.33-13,428.84

Finding the Fourth Proportional to 21,928.07, 30,260.33 and 13,428.84

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Solution

The fourth proportional to 21,928.07, 30,260.33 and 13,428.84 is: 18,531.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,928.07 : 30,260.33 = 13,428.84 : x
  2. Step 2: Convert to fraction form
    21,928.07/30,260.33 = 13,428.84/x
  3. Step 3: Cross multiply
    21,928.07x = 30,260.33 × 13,428.84
  4. Step 4: Simplify right side
    21,928.07x = 406,361,062.77
  5. Step 5: Solve for x
    x = 406,361,062.77/21,928.07
  6. Step 6: Final answer
    x = 18,531.55

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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.