Home / 20,985.82-28,960.45-11,554.31

Finding the Fourth Proportional to 20,985.82, 28,960.45 and 11,554.31

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Solution

The fourth proportional to 20,985.82, 28,960.45 and 11,554.31 is: 15,944.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.82 : 28,960.45 = 11,554.31 : x
  2. Step 2: Convert to fraction form
    20,985.82/28,960.45 = 11,554.31/x
  3. Step 3: Cross multiply
    20,985.82x = 28,960.45 × 11,554.31
  4. Step 4: Simplify right side
    20,985.82x = 334,618,060.55
  5. Step 5: Solve for x
    x = 334,618,060.55/20,985.82
  6. Step 6: Final answer
    x = 15,944.96

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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.