Home / 12,688.84-19,005.04-8,979.85

Finding the Fourth Proportional to 12,688.84, 19,005.04 and 8,979.85

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Solution

The fourth proportional to 12,688.84, 19,005.04 and 8,979.85 is: 13,449.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.84 : 19,005.04 = 8,979.85 : x
  2. Step 2: Convert to fraction form
    12,688.84/19,005.04 = 8,979.85/x
  3. Step 3: Cross multiply
    12,688.84x = 19,005.04 × 8,979.85
  4. Step 4: Simplify right side
    12,688.84x = 170,662,408.44
  5. Step 5: Solve for x
    x = 170,662,408.44/12,688.84
  6. Step 6: Final answer
    x = 13,449.80

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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.