Home / 42,819.80-64,231.50-13,238.19

Finding the Fourth Proportional to 42,819.80, 64,231.50 and 13,238.19

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Solution

The fourth proportional to 42,819.80, 64,231.50 and 13,238.19 is: 19,857.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,819.80 : 64,231.50 = 13,238.19 : x
  2. Step 2: Convert to fraction form
    42,819.80/64,231.50 = 13,238.19/x
  3. Step 3: Cross multiply
    42,819.80x = 64,231.50 × 13,238.19
  4. Step 4: Simplify right side
    42,819.80x = 850,308,800.99
  5. Step 5: Solve for x
    x = 850,308,800.99/42,819.80
  6. Step 6: Final answer
    x = 19,857.84

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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.