Home / 12,777.80-17,633.23-7,112.45

Finding the Fourth Proportional to 12,777.80, 17,633.23 and 7,112.45

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Solution

The fourth proportional to 12,777.80, 17,633.23 and 7,112.45 is: 9,815.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,777.80 : 17,633.23 = 7,112.45 : x
  2. Step 2: Convert to fraction form
    12,777.80/17,633.23 = 7,112.45/x
  3. Step 3: Cross multiply
    12,777.80x = 17,633.23 × 7,112.45
  4. Step 4: Simplify right side
    12,777.80x = 125,415,493.02
  5. Step 5: Solve for x
    x = 125,415,493.02/12,777.80
  6. Step 6: Final answer
    x = 9,815.11

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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.