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Finding the Fourth Proportional to 19,490.49, 26,890.49 and 11,928.93

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Solution

The fourth proportional to 19,490.49, 26,890.49 and 11,928.93 is: 16,458.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,490.49 : 26,890.49 = 11,928.93 : x
  2. Step 2: Convert to fraction form
    19,490.49/26,890.49 = 11,928.93/x
  3. Step 3: Cross multiply
    19,490.49x = 26,890.49 × 11,928.93
  4. Step 4: Simplify right side
    19,490.49x = 320,774,772.88
  5. Step 5: Solve for x
    x = 320,774,772.88/19,490.49
  6. Step 6: Final answer
    x = 16,458.01

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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.