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Finding the Fourth Proportional to 19,121.99, 26,388.93 and 11,569.71

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Solution

The fourth proportional to 19,121.99, 26,388.93 and 11,569.71 is: 15,966.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,121.99 : 26,388.93 = 11,569.71 : x
  2. Step 2: Convert to fraction form
    19,121.99/26,388.93 = 11,569.71/x
  3. Step 3: Cross multiply
    19,121.99x = 26,388.93 × 11,569.71
  4. Step 4: Simplify right side
    19,121.99x = 305,312,135.37
  5. Step 5: Solve for x
    x = 305,312,135.37/19,121.99
  6. Step 6: Final answer
    x = 15,966.55

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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.