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Finding the Fourth Proportional to 17,776.80, 26,686.80 and 13,359.60

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Solution

The fourth proportional to 17,776.80, 26,686.80 and 13,359.60 is: 20,055.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,776.80 : 26,686.80 = 13,359.60 : x
  2. Step 2: Convert to fraction form
    17,776.80/26,686.80 = 13,359.60/x
  3. Step 3: Cross multiply
    17,776.80x = 26,686.80 × 13,359.60
  4. Step 4: Simplify right side
    17,776.80x = 356,524,973.28
  5. Step 5: Solve for x
    x = 356,524,973.28/17,776.80
  6. Step 6: Final answer
    x = 20,055.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.