Home / 12,777.28-17,632.20-7,111.84

Finding the Fourth Proportional to 12,777.28, 17,632.20 and 7,111.84

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Solution

The fourth proportional to 12,777.28, 17,632.20 and 7,111.84 is: 9,814.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,777.28 : 17,632.20 = 7,111.84 : x
  2. Step 2: Convert to fraction form
    12,777.28/17,632.20 = 7,111.84/x
  3. Step 3: Cross multiply
    12,777.28x = 17,632.20 × 7,111.84
  4. Step 4: Simplify right side
    12,777.28x = 125,397,385.25
  5. Step 5: Solve for x
    x = 125,397,385.25/12,777.28
  6. Step 6: Final answer
    x = 9,814.09

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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.