Home / 12,686.81-19,030.30-3,326.75

Finding the Fourth Proportional to 12,686.81, 19,030.30 and 3,326.75

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Solution

The fourth proportional to 12,686.81, 19,030.30 and 3,326.75 is: 4,990.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686.81 : 19,030.30 = 3,326.75 : x
  2. Step 2: Convert to fraction form
    12,686.81/19,030.30 = 3,326.75/x
  3. Step 3: Cross multiply
    12,686.81x = 19,030.30 × 3,326.75
  4. Step 4: Simplify right side
    12,686.81x = 63,309,050.53
  5. Step 5: Solve for x
    x = 63,309,050.53/12,686.81
  6. Step 6: Final answer
    x = 4,990.15

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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.