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Finding the Fourth Proportional to 19,550.28, 26,978.76 and 11,166.80

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Solution

The fourth proportional to 19,550.28, 26,978.76 and 11,166.80 is: 15,409.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,550.28 : 26,978.76 = 11,166.80 : x
  2. Step 2: Convert to fraction form
    19,550.28/26,978.76 = 11,166.80/x
  3. Step 3: Cross multiply
    19,550.28x = 26,978.76 × 11,166.80
  4. Step 4: Simplify right side
    19,550.28x = 301,266,417.17
  5. Step 5: Solve for x
    x = 301,266,417.17/19,550.28
  6. Step 6: Final answer
    x = 15,409.83

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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.