Home / 12,979.40-19,469.10-8,832.20

Finding the Fourth Proportional to 12,979.40, 19,469.10 and 8,832.20

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Solution

The fourth proportional to 12,979.40, 19,469.10 and 8,832.20 is: 13,248.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.40 : 19,469.10 = 8,832.20 : x
  2. Step 2: Convert to fraction form
    12,979.40/19,469.10 = 8,832.20/x
  3. Step 3: Cross multiply
    12,979.40x = 19,469.10 × 8,832.20
  4. Step 4: Simplify right side
    12,979.40x = 171,954,985.02
  5. Step 5: Solve for x
    x = 171,954,985.02/12,979.40
  6. Step 6: Final answer
    x = 13,248.30

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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.