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Finding the Fourth Proportional to 19,520.80, 26,935.80 and 11,860.09

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Solution

The fourth proportional to 19,520.80, 26,935.80 and 11,860.09 is: 16,365.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,520.80 : 26,935.80 = 11,860.09 : x
  2. Step 2: Convert to fraction form
    19,520.80/26,935.80 = 11,860.09/x
  3. Step 3: Cross multiply
    19,520.80x = 26,935.80 × 11,860.09
  4. Step 4: Simplify right side
    19,520.80x = 319,461,012.22
  5. Step 5: Solve for x
    x = 319,461,012.22/19,520.80
  6. Step 6: Final answer
    x = 16,365.16

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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.