Home / 20,919.65-28,849.82-14,215.28

Finding the Fourth Proportional to 20,919.65, 28,849.82 and 14,215.28

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Solution

The fourth proportional to 20,919.65, 28,849.82 and 14,215.28 is: 19,603.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.65 : 28,849.82 = 14,215.28 : x
  2. Step 2: Convert to fraction form
    20,919.65/28,849.82 = 14,215.28/x
  3. Step 3: Cross multiply
    20,919.65x = 28,849.82 × 14,215.28
  4. Step 4: Simplify right side
    20,919.65x = 410,108,053.92
  5. Step 5: Solve for x
    x = 410,108,053.92/20,919.65
  6. Step 6: Final answer
    x = 19,603.97

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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.