Home / 14,777.77-20,385.39-9,991.41

Finding the Fourth Proportional to 14,777.77, 20,385.39 and 9,991.41

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Solution

The fourth proportional to 14,777.77, 20,385.39 and 9,991.41 is: 13,782.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,777.77 : 20,385.39 = 9,991.41 : x
  2. Step 2: Convert to fraction form
    14,777.77/20,385.39 = 9,991.41/x
  3. Step 3: Cross multiply
    14,777.77x = 20,385.39 × 9,991.41
  4. Step 4: Simplify right side
    14,777.77x = 203,678,789.50
  5. Step 5: Solve for x
    x = 203,678,789.50/14,777.77
  6. Step 6: Final answer
    x = 13,782.78

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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.