Home / 28,956.82-39,985.35-18,219.60

Finding the Fourth Proportional to 28,956.82, 39,985.35 and 18,219.60

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Solution

The fourth proportional to 28,956.82, 39,985.35 and 18,219.60 is: 25,158.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,956.82 : 39,985.35 = 18,219.60 : x
  2. Step 2: Convert to fraction form
    28,956.82/39,985.35 = 18,219.60/x
  3. Step 3: Cross multiply
    28,956.82x = 39,985.35 × 18,219.60
  4. Step 4: Simplify right side
    28,956.82x = 728,517,082.86
  5. Step 5: Solve for x
    x = 728,517,082.86/28,956.82
  6. Step 6: Final answer
    x = 25,158.74

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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.