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Finding the Fourth Proportional to 19,718.96, 27,206.96 and 11,221.16

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Solution

The fourth proportional to 19,718.96, 27,206.96 and 11,221.16 is: 15,482.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,718.96 : 27,206.96 = 11,221.16 : x
  2. Step 2: Convert to fraction form
    19,718.96/27,206.96 = 11,221.16/x
  3. Step 3: Cross multiply
    19,718.96x = 27,206.96 × 11,221.16
  4. Step 4: Simplify right side
    19,718.96x = 305,293,651.27
  5. Step 5: Solve for x
    x = 305,293,651.27/19,718.96
  6. Step 6: Final answer
    x = 15,482.24

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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.