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Finding the Fourth Proportional to 12,714.66, 18,929.55 and 12,653.10

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Solution

The fourth proportional to 12,714.66, 18,929.55 and 12,653.10 is: 18,837.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,714.66 : 18,929.55 = 12,653.10 : x
  2. Step 2: Convert to fraction form
    12,714.66/18,929.55 = 12,653.10/x
  3. Step 3: Cross multiply
    12,714.66x = 18,929.55 × 12,653.10
  4. Step 4: Simplify right side
    12,714.66x = 239,517,489.11
  5. Step 5: Solve for x
    x = 239,517,489.11/12,714.66
  6. Step 6: Final answer
    x = 18,837.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.