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Finding the Fourth Proportional to 13,269.76, 18,272.77 and 12,975.10

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Solution

The fourth proportional to 13,269.76, 18,272.77 and 12,975.10 is: 17,867.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,269.76 : 18,272.77 = 12,975.10 : x
  2. Step 2: Convert to fraction form
    13,269.76/18,272.77 = 12,975.10/x
  3. Step 3: Cross multiply
    13,269.76x = 18,272.77 × 12,975.10
  4. Step 4: Simplify right side
    13,269.76x = 237,091,018.03
  5. Step 5: Solve for x
    x = 237,091,018.03/13,269.76
  6. Step 6: Final answer
    x = 17,867.02

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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.