Home / 42,786.54-64,178.70-11,620.98

Finding the Fourth Proportional to 42,786.54, 64,178.70 and 11,620.98

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Solution

The fourth proportional to 42,786.54, 64,178.70 and 11,620.98 is: 17,431.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,786.54 : 64,178.70 = 11,620.98 : x
  2. Step 2: Convert to fraction form
    42,786.54/64,178.70 = 11,620.98/x
  3. Step 3: Cross multiply
    42,786.54x = 64,178.70 × 11,620.98
  4. Step 4: Simplify right side
    42,786.54x = 745,819,389.13
  5. Step 5: Solve for x
    x = 745,819,389.13/42,786.54
  6. Step 6: Final answer
    x = 17,431.17

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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.