Home / 12,777.19-17,631.13-7,111.05

Finding the Fourth Proportional to 12,777.19, 17,631.13 and 7,111.05

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Solution

The fourth proportional to 12,777.19, 17,631.13 and 7,111.05 is: 9,812.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,777.19 : 17,631.13 = 7,111.05 : x
  2. Step 2: Convert to fraction form
    12,777.19/17,631.13 = 7,111.05/x
  3. Step 3: Cross multiply
    12,777.19x = 17,631.13 × 7,111.05
  4. Step 4: Simplify right side
    12,777.19x = 125,375,846.99
  5. Step 5: Solve for x
    x = 125,375,846.99/12,777.19
  6. Step 6: Final answer
    x = 9,812.47

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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.