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Finding the Fourth Proportional to 12,313.80, 16,987.14 and 8,951.40

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Solution

The fourth proportional to 12,313.80, 16,987.14 and 8,951.40 is: 12,348.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,313.80 : 16,987.14 = 8,951.40 : x
  2. Step 2: Convert to fraction form
    12,313.80/16,987.14 = 8,951.40/x
  3. Step 3: Cross multiply
    12,313.80x = 16,987.14 × 8,951.40
  4. Step 4: Simplify right side
    12,313.80x = 152,058,685.00
  5. Step 5: Solve for x
    x = 152,058,685.00/12,313.80
  6. Step 6: Final answer
    x = 12,348.64

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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.