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Finding the Fourth Proportional to 13,959.20, 19,264.76 and 7,992.72

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Solution

The fourth proportional to 13,959.20, 19,264.76 and 7,992.72 is: 11,030.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.20 : 19,264.76 = 7,992.72 : x
  2. Step 2: Convert to fraction form
    13,959.20/19,264.76 = 7,992.72/x
  3. Step 3: Cross multiply
    13,959.20x = 19,264.76 × 7,992.72
  4. Step 4: Simplify right side
    13,959.20x = 153,977,832.55
  5. Step 5: Solve for x
    x = 153,977,832.55/13,959.20
  6. Step 6: Final answer
    x = 11,030.56

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.