Home / 13,788.80-19,026.96-7,819.28

Finding the Fourth Proportional to 13,788.80, 19,026.96 and 7,819.28

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Solution

The fourth proportional to 13,788.80, 19,026.96 and 7,819.28 is: 10,789.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,788.80 : 19,026.96 = 7,819.28 : x
  2. Step 2: Convert to fraction form
    13,788.80/19,026.96 = 7,819.28/x
  3. Step 3: Cross multiply
    13,788.80x = 19,026.96 × 7,819.28
  4. Step 4: Simplify right side
    13,788.80x = 148,777,127.79
  5. Step 5: Solve for x
    x = 148,777,127.79/13,788.80
  6. Step 6: Final answer
    x = 10,789.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.