Home / 12,986.12-19,465.14-5,186.36

Finding the Fourth Proportional to 12,986.12, 19,465.14 and 5,186.36

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Solution

The fourth proportional to 12,986.12, 19,465.14 and 5,186.36 is: 7,773.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.12 : 19,465.14 = 5,186.36 : x
  2. Step 2: Convert to fraction form
    12,986.12/19,465.14 = 5,186.36/x
  3. Step 3: Cross multiply
    12,986.12x = 19,465.14 × 5,186.36
  4. Step 4: Simplify right side
    12,986.12x = 100,953,223.49
  5. Step 5: Solve for x
    x = 100,953,223.49/12,986.12
  6. Step 6: Final answer
    x = 7,773.93

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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.