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Finding the Fourth Proportional to 13,356.09, 18,430.47 and 7,387.20

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Solution

The fourth proportional to 13,356.09, 18,430.47 and 7,387.20 is: 10,193.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.09 : 18,430.47 = 7,387.20 : x
  2. Step 2: Convert to fraction form
    13,356.09/18,430.47 = 7,387.20/x
  3. Step 3: Cross multiply
    13,356.09x = 18,430.47 × 7,387.20
  4. Step 4: Simplify right side
    13,356.09x = 136,149,567.98
  5. Step 5: Solve for x
    x = 136,149,567.98/13,356.09
  6. Step 6: Final answer
    x = 10,193.82

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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.