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Finding the Fourth Proportional to 11,153.76, 15,390.44 and 6,437.12

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Solution

The fourth proportional to 11,153.76, 15,390.44 and 6,437.12 is: 8,882.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,153.76 : 15,390.44 = 6,437.12 : x
  2. Step 2: Convert to fraction form
    11,153.76/15,390.44 = 6,437.12/x
  3. Step 3: Cross multiply
    11,153.76x = 15,390.44 × 6,437.12
  4. Step 4: Simplify right side
    11,153.76x = 99,070,109.13
  5. Step 5: Solve for x
    x = 99,070,109.13/11,153.76
  6. Step 6: Final answer
    x = 8,882.22

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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.