Home / 12,982.10-19,490.41-8,779.47

Finding the Fourth Proportional to 12,982.10, 19,490.41 and 8,779.47

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Solution

The fourth proportional to 12,982.10, 19,490.41 and 8,779.47 is: 13,180.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,982.10 : 19,490.41 = 8,779.47 : x
  2. Step 2: Convert to fraction form
    12,982.10/19,490.41 = 8,779.47/x
  3. Step 3: Cross multiply
    12,982.10x = 19,490.41 × 8,779.47
  4. Step 4: Simplify right side
    12,982.10x = 171,115,447.93
  5. Step 5: Solve for x
    x = 171,115,447.93/12,982.10
  6. Step 6: Final answer
    x = 13,180.87

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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.