Home / 28,979.12-43,477.98-13,189.78

Finding the Fourth Proportional to 28,979.12, 43,477.98 and 13,189.78

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Solution

The fourth proportional to 28,979.12, 43,477.98 and 13,189.78 is: 19,788.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,979.12 : 43,477.98 = 13,189.78 : x
  2. Step 2: Convert to fraction form
    28,979.12/43,477.98 = 13,189.78/x
  3. Step 3: Cross multiply
    28,979.12x = 43,477.98 × 13,189.78
  4. Step 4: Simplify right side
    28,979.12x = 573,464,991.04
  5. Step 5: Solve for x
    x = 573,464,991.04/28,979.12
  6. Step 6: Final answer
    x = 19,788.90

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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.