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Finding the Fourth Proportional to 13,310.82, 18,368.88 and 7,342.86

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Solution

The fourth proportional to 13,310.82, 18,368.88 and 7,342.86 is: 10,133.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,310.82 : 18,368.88 = 7,342.86 : x
  2. Step 2: Convert to fraction form
    13,310.82/18,368.88 = 7,342.86/x
  3. Step 3: Cross multiply
    13,310.82x = 18,368.88 × 7,342.86
  4. Step 4: Simplify right side
    13,310.82x = 134,880,114.20
  5. Step 5: Solve for x
    x = 134,880,114.20/13,310.82
  6. Step 6: Final answer
    x = 10,133.12

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1.5x scale

Why These Related Problems?

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