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Finding the Fourth Proportional to 13,752.81, 18,979.16 and 8,975.82

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Solution

The fourth proportional to 13,752.81, 18,979.16 and 8,975.82 is: 12,386.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,752.81 : 18,979.16 = 8,975.82 : x
  2. Step 2: Convert to fraction form
    13,752.81/18,979.16 = 8,975.82/x
  3. Step 3: Cross multiply
    13,752.81x = 18,979.16 × 8,975.82
  4. Step 4: Simplify right side
    13,752.81x = 170,353,523.91
  5. Step 5: Solve for x
    x = 170,353,523.91/13,752.81
  6. Step 6: Final answer
    x = 12,386.82

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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.