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Finding the Fourth Proportional to 14,639.08, 21,939.81 and 7,618.12

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Solution

The fourth proportional to 14,639.08, 21,939.81 and 7,618.12 is: 11,417.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,639.08 : 21,939.81 = 7,618.12 : x
  2. Step 2: Convert to fraction form
    14,639.08/21,939.81 = 7,618.12/x
  3. Step 3: Cross multiply
    14,639.08x = 21,939.81 × 7,618.12
  4. Step 4: Simplify right side
    14,639.08x = 167,140,105.36
  5. Step 5: Solve for x
    x = 167,140,105.36/14,639.08
  6. Step 6: Final answer
    x = 11,417.39

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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.