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Finding the Fourth Proportional to 28,999.95, 43,498.29 and 7,938.45

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Solution

The fourth proportional to 28,999.95, 43,498.29 and 7,938.45 is: 11,907.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,999.95 : 43,498.29 = 7,938.45 : x
  2. Step 2: Convert to fraction form
    28,999.95/43,498.29 = 7,938.45/x
  3. Step 3: Cross multiply
    28,999.95x = 43,498.29 × 7,938.45
  4. Step 4: Simplify right side
    28,999.95x = 345,309,000.25
  5. Step 5: Solve for x
    x = 345,309,000.25/28,999.95
  6. Step 6: Final answer
    x = 11,907.23

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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.