Home / 20,952.72-28,913.66-11,521.60

Finding the Fourth Proportional to 20,952.72, 28,913.66 and 11,521.60

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Solution

The fourth proportional to 20,952.72, 28,913.66 and 11,521.60 is: 15,899.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,952.72 : 28,913.66 = 11,521.60 : x
  2. Step 2: Convert to fraction form
    20,952.72/28,913.66 = 11,521.60/x
  3. Step 3: Cross multiply
    20,952.72x = 28,913.66 × 11,521.60
  4. Step 4: Simplify right side
    20,952.72x = 333,131,625.06
  5. Step 5: Solve for x
    x = 333,131,625.06/20,952.72
  6. Step 6: Final answer
    x = 15,899.21

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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.