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Finding the Fourth Proportional to 12,305.54, 16,981.70 and 7,000.71

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Solution

The fourth proportional to 12,305.54, 16,981.70 and 7,000.71 is: 9,661.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,305.54 : 16,981.70 = 7,000.71 : x
  2. Step 2: Convert to fraction form
    12,305.54/16,981.70 = 7,000.71/x
  3. Step 3: Cross multiply
    12,305.54x = 16,981.70 × 7,000.71
  4. Step 4: Simplify right side
    12,305.54x = 118,883,922.00
  5. Step 5: Solve for x
    x = 118,883,922.00/12,305.54
  6. Step 6: Final answer
    x = 9,661.01

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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.