Home / 12,678.21-19,017.30-4,881.56

Finding the Fourth Proportional to 12,678.21, 19,017.30 and 4,881.56

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Solution

The fourth proportional to 12,678.21, 19,017.30 and 4,881.56 is: 7,322.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.21 : 19,017.30 = 4,881.56 : x
  2. Step 2: Convert to fraction form
    12,678.21/19,017.30 = 4,881.56/x
  3. Step 3: Cross multiply
    12,678.21x = 19,017.30 × 4,881.56
  4. Step 4: Simplify right side
    12,678.21x = 92,833,995.90
  5. Step 5: Solve for x
    x = 92,833,995.90/12,678.21
  6. Step 6: Final answer
    x = 7,322.33

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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.