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Finding the Fourth Proportional to 28,701, 43,058.40 and 9,978.30

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Solution

The fourth proportional to 28,701, 43,058.40 and 9,978.30 is: 14,969.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,701 : 43,058.40 = 9,978.30 : x
  2. Step 2: Convert to fraction form
    28,701/43,058.40 = 9,978.30/x
  3. Step 3: Cross multiply
    28,701x = 43,058.40 × 9,978.30
  4. Step 4: Simplify right side
    28,701x = 429,649,632.72
  5. Step 5: Solve for x
    x = 429,649,632.72/28,701
  6. Step 6: Final answer
    x = 14,969.85

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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.