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Finding the Fourth Proportional to 13,133.40, 18,103.98 and 9,345.24

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Solution

The fourth proportional to 13,133.40, 18,103.98 and 9,345.24 is: 12,882.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,133.40 : 18,103.98 = 9,345.24 : x
  2. Step 2: Convert to fraction form
    13,133.40/18,103.98 = 9,345.24/x
  3. Step 3: Cross multiply
    13,133.40x = 18,103.98 × 9,345.24
  4. Step 4: Simplify right side
    13,133.40x = 169,186,038.06
  5. Step 5: Solve for x
    x = 169,186,038.06/13,133.40
  6. Step 6: Final answer
    x = 12,882.12

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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.