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Finding the Fourth Proportional to 13,319.16, 18,363.36 and 10,920.30

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Solution

The fourth proportional to 13,319.16, 18,363.36 and 10,920.30 is: 15,056.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.16 : 18,363.36 = 10,920.30 : x
  2. Step 2: Convert to fraction form
    13,319.16/18,363.36 = 10,920.30/x
  3. Step 3: Cross multiply
    13,319.16x = 18,363.36 × 10,920.30
  4. Step 4: Simplify right side
    13,319.16x = 200,533,400.21
  5. Step 5: Solve for x
    x = 200,533,400.21/13,319.16
  6. Step 6: Final answer
    x = 15,056.01

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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.