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Finding the Fourth Proportional to 12,618, 18,921.23 and 4,714.72

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Solution

The fourth proportional to 12,618, 18,921.23 and 4,714.72 is: 7,069.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618 : 18,921.23 = 4,714.72 : x
  2. Step 2: Convert to fraction form
    12,618/18,921.23 = 4,714.72/x
  3. Step 3: Cross multiply
    12,618x = 18,921.23 × 4,714.72
  4. Step 4: Simplify right side
    12,618x = 89,208,265.99
  5. Step 5: Solve for x
    x = 89,208,265.99/12,618
  6. Step 6: Final answer
    x = 7,069.92

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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.