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Finding the Fourth Proportional to 19,616.65, 29,415.70 and 7,127.97

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Solution

The fourth proportional to 19,616.65, 29,415.70 and 7,127.97 is: 10,688.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,616.65 : 29,415.70 = 7,127.97 : x
  2. Step 2: Convert to fraction form
    19,616.65/29,415.70 = 7,127.97/x
  3. Step 3: Cross multiply
    19,616.65x = 29,415.70 × 7,127.97
  4. Step 4: Simplify right side
    19,616.65x = 209,674,227.13
  5. Step 5: Solve for x
    x = 209,674,227.13/19,616.65
  6. Step 6: Final answer
    x = 10,688.58

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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.