Home / 19,890.77-27,453.45-12,618.17

Finding the Fourth Proportional to 19,890.77, 27,453.45 and 12,618.17

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Solution

The fourth proportional to 19,890.77, 27,453.45 and 12,618.17 is: 17,415.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.77 : 27,453.45 = 12,618.17 : x
  2. Step 2: Convert to fraction form
    19,890.77/27,453.45 = 12,618.17/x
  3. Step 3: Cross multiply
    19,890.77x = 27,453.45 × 12,618.17
  4. Step 4: Simplify right side
    19,890.77x = 346,412,161.92
  5. Step 5: Solve for x
    x = 346,412,161.92/19,890.77
  6. Step 6: Final answer
    x = 17,415.73

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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.