Home / 28,215.95-42,488.82-20,872.22

Finding the Fourth Proportional to 28,215.95, 42,488.82 and 20,872.22

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Solution

The fourth proportional to 28,215.95, 42,488.82 and 20,872.22 is: 31,430.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.95 : 42,488.82 = 20,872.22 : x
  2. Step 2: Convert to fraction form
    28,215.95/42,488.82 = 20,872.22/x
  3. Step 3: Cross multiply
    28,215.95x = 42,488.82 × 20,872.22
  4. Step 4: Simplify right side
    28,215.95x = 886,835,786.14
  5. Step 5: Solve for x
    x = 886,835,786.14/28,215.95
  6. Step 6: Final answer
    x = 31,430.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.