Home / 12,926.90-19,378.61-8,979.99

Finding the Fourth Proportional to 12,926.90, 19,378.61 and 8,979.99

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Solution

The fourth proportional to 12,926.90, 19,378.61 and 8,979.99 is: 13,461.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,926.90 : 19,378.61 = 8,979.99 : x
  2. Step 2: Convert to fraction form
    12,926.90/19,378.61 = 8,979.99/x
  3. Step 3: Cross multiply
    12,926.90x = 19,378.61 × 8,979.99
  4. Step 4: Simplify right side
    12,926.90x = 174,019,679.11
  5. Step 5: Solve for x
    x = 174,019,679.11/12,926.90
  6. Step 6: Final answer
    x = 13,461.83

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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.