Home / 21,928.31-30,274.90-15,211.59

Finding the Fourth Proportional to 21,928.31, 30,274.90 and 15,211.59

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Solution

The fourth proportional to 21,928.31, 30,274.90 and 15,211.59 is: 21,001.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,928.31 : 30,274.90 = 15,211.59 : x
  2. Step 2: Convert to fraction form
    21,928.31/30,274.90 = 15,211.59/x
  3. Step 3: Cross multiply
    21,928.31x = 30,274.90 × 15,211.59
  4. Step 4: Simplify right side
    21,928.31x = 460,529,366.09
  5. Step 5: Solve for x
    x = 460,529,366.09/21,928.31
  6. Step 6: Final answer
    x = 21,001.59

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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.