Home / 20,985.22-28,958.52-11,554.12

Finding the Fourth Proportional to 20,985.22, 28,958.52 and 11,554.12

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Solution

The fourth proportional to 20,985.22, 28,958.52 and 11,554.12 is: 15,944.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.22 : 28,958.52 = 11,554.12 : x
  2. Step 2: Convert to fraction form
    20,985.22/28,958.52 = 11,554.12/x
  3. Step 3: Cross multiply
    20,985.22x = 28,958.52 × 11,554.12
  4. Step 4: Simplify right side
    20,985.22x = 334,590,215.10
  5. Step 5: Solve for x
    x = 334,590,215.10/20,985.22
  6. Step 6: Final answer
    x = 15,944.09

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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.