Home / 20,638.51-30,928.59-10,257.55

Finding the Fourth Proportional to 20,638.51, 30,928.59 and 10,257.55

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Solution

The fourth proportional to 20,638.51, 30,928.59 and 10,257.55 is: 15,371.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.51 : 30,928.59 = 10,257.55 : x
  2. Step 2: Convert to fraction form
    20,638.51/30,928.59 = 10,257.55/x
  3. Step 3: Cross multiply
    20,638.51x = 30,928.59 × 10,257.55
  4. Step 4: Simplify right side
    20,638.51x = 317,251,558.35
  5. Step 5: Solve for x
    x = 317,251,558.35/20,638.51
  6. Step 6: Final answer
    x = 15,371.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.