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Finding the Fourth Proportional to 19,390.80, 26,758.80 and 11,007.12

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Solution

The fourth proportional to 19,390.80, 26,758.80 and 11,007.12 is: 15,189.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,390.80 : 26,758.80 = 11,007.12 : x
  2. Step 2: Convert to fraction form
    19,390.80/26,758.80 = 11,007.12/x
  3. Step 3: Cross multiply
    19,390.80x = 26,758.80 × 11,007.12
  4. Step 4: Simplify right side
    19,390.80x = 294,537,322.66
  5. Step 5: Solve for x
    x = 294,537,322.66/19,390.80
  6. Step 6: Final answer
    x = 15,189.54

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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.