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Finding the Fourth Proportional to 13,062.75, 18,031.74 and 8,816.32

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Solution

The fourth proportional to 13,062.75, 18,031.74 and 8,816.32 is: 12,169.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,062.75 : 18,031.74 = 8,816.32 : x
  2. Step 2: Convert to fraction form
    13,062.75/18,031.74 = 8,816.32/x
  3. Step 3: Cross multiply
    13,062.75x = 18,031.74 × 8,816.32
  4. Step 4: Simplify right side
    13,062.75x = 158,973,590.00
  5. Step 5: Solve for x
    x = 158,973,590.00/13,062.75
  6. Step 6: Final answer
    x = 12,169.99

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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.