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Finding the Fourth Proportional to 18,995.90, 28,493.86 and 4,955.90

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Solution

The fourth proportional to 18,995.90, 28,493.86 and 4,955.90 is: 7,433.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.90 : 28,493.86 = 4,955.90 : x
  2. Step 2: Convert to fraction form
    18,995.90/28,493.86 = 4,955.90/x
  3. Step 3: Cross multiply
    18,995.90x = 28,493.86 × 4,955.90
  4. Step 4: Simplify right side
    18,995.90x = 141,212,779.62
  5. Step 5: Solve for x
    x = 141,212,779.62/18,995.90
  6. Step 6: Final answer
    x = 7,433.86

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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.