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Finding the Fourth Proportional to 19,653.74, 27,122.74 and 11,155.69

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Solution

The fourth proportional to 19,653.74, 27,122.74 and 11,155.69 is: 15,395.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,653.74 : 27,122.74 = 11,155.69 : x
  2. Step 2: Convert to fraction form
    19,653.74/27,122.74 = 11,155.69/x
  3. Step 3: Cross multiply
    19,653.74x = 27,122.74 × 11,155.69
  4. Step 4: Simplify right side
    19,653.74x = 302,572,879.39
  5. Step 5: Solve for x
    x = 302,572,879.39/19,653.74
  6. Step 6: Final answer
    x = 15,395.18

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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.