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Finding the Fourth Proportional to 12,461.90, 18,714.45 and 6,629.90

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Solution

The fourth proportional to 12,461.90, 18,714.45 and 6,629.90 is: 9,956.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,461.90 : 18,714.45 = 6,629.90 : x
  2. Step 2: Convert to fraction form
    12,461.90/18,714.45 = 6,629.90/x
  3. Step 3: Cross multiply
    12,461.90x = 18,714.45 × 6,629.90
  4. Step 4: Simplify right side
    12,461.90x = 124,074,932.06
  5. Step 5: Solve for x
    x = 124,074,932.06/12,461.90
  6. Step 6: Final answer
    x = 9,956.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.