Home / 12,305.36-16,981.80-7,000.40

Finding the Fourth Proportional to 12,305.36, 16,981.80 and 7,000.40

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Solution

The fourth proportional to 12,305.36, 16,981.80 and 7,000.40 is: 9,660.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,305.36 : 16,981.80 = 7,000.40 : x
  2. Step 2: Convert to fraction form
    12,305.36/16,981.80 = 7,000.40/x
  3. Step 3: Cross multiply
    12,305.36x = 16,981.80 × 7,000.40
  4. Step 4: Simplify right side
    12,305.36x = 118,879,392.72
  5. Step 5: Solve for x
    x = 118,879,392.72/12,305.36
  6. Step 6: Final answer
    x = 9,660.78

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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.