Home / 28,157.82-38,859-15,582.57

Finding the Fourth Proportional to 28,157.82, 38,859 and 15,582.57

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Solution

The fourth proportional to 28,157.82, 38,859 and 15,582.57 is: 21,504.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157.82 : 38,859 = 15,582.57 : x
  2. Step 2: Convert to fraction form
    28,157.82/38,859 = 15,582.57/x
  3. Step 3: Cross multiply
    28,157.82x = 38,859 × 15,582.57
  4. Step 4: Simplify right side
    28,157.82x = 605,523,087.63
  5. Step 5: Solve for x
    x = 605,523,087.63/28,157.82
  6. Step 6: Final answer
    x = 21,504.62

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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.