Home / 12,285.66-16,954.28-6,980.78

Finding the Fourth Proportional to 12,285.66, 16,954.28 and 6,980.78

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Solution

The fourth proportional to 12,285.66, 16,954.28 and 6,980.78 is: 9,633.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,285.66 : 16,954.28 = 6,980.78 : x
  2. Step 2: Convert to fraction form
    12,285.66/16,954.28 = 6,980.78/x
  3. Step 3: Cross multiply
    12,285.66x = 16,954.28 × 6,980.78
  4. Step 4: Simplify right side
    12,285.66x = 118,354,098.74
  5. Step 5: Solve for x
    x = 118,354,098.74/12,285.66
  6. Step 6: Final answer
    x = 9,633.52

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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.