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Finding the Fourth Proportional to 19,616.46, 29,415.44 and 7,127.68

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Solution

The fourth proportional to 19,616.46, 29,415.44 and 7,127.68 is: 10,688.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,616.46 : 29,415.44 = 7,127.68 : x
  2. Step 2: Convert to fraction form
    19,616.46/29,415.44 = 7,127.68/x
  3. Step 3: Cross multiply
    19,616.46x = 29,415.44 × 7,127.68
  4. Step 4: Simplify right side
    19,616.46x = 209,663,843.38
  5. Step 5: Solve for x
    x = 209,663,843.38/19,616.46
  6. Step 6: Final answer
    x = 10,688.16

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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.