Home / 12,681.12-19,021.68-6,874.50

Finding the Fourth Proportional to 12,681.12, 19,021.68 and 6,874.50

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Solution

The fourth proportional to 12,681.12, 19,021.68 and 6,874.50 is: 10,311.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,681.12 : 19,021.68 = 6,874.50 : x
  2. Step 2: Convert to fraction form
    12,681.12/19,021.68 = 6,874.50/x
  3. Step 3: Cross multiply
    12,681.12x = 19,021.68 × 6,874.50
  4. Step 4: Simplify right side
    12,681.12x = 130,764,539.16
  5. Step 5: Solve for x
    x = 130,764,539.16/12,681.12
  6. Step 6: Final answer
    x = 10,311.75

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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.