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Finding the Fourth Proportional to 14,101.66, 19,461.08 and 7,728.09

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Solution

The fourth proportional to 14,101.66, 19,461.08 and 7,728.09 is: 10,665.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,101.66 : 19,461.08 = 7,728.09 : x
  2. Step 2: Convert to fraction form
    14,101.66/19,461.08 = 7,728.09/x
  3. Step 3: Cross multiply
    14,101.66x = 19,461.08 × 7,728.09
  4. Step 4: Simplify right side
    14,101.66x = 150,396,977.74
  5. Step 5: Solve for x
    x = 150,396,977.74/14,101.66
  6. Step 6: Final answer
    x = 10,665.20

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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.