Home / 20,987.34-28,961.43-11,554.08

Finding the Fourth Proportional to 20,987.34, 28,961.43 and 11,554.08

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Solution

The fourth proportional to 20,987.34, 28,961.43 and 11,554.08 is: 15,944.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.34 : 28,961.43 = 11,554.08 : x
  2. Step 2: Convert to fraction form
    20,987.34/28,961.43 = 11,554.08/x
  3. Step 3: Cross multiply
    20,987.34x = 28,961.43 × 11,554.08
  4. Step 4: Simplify right side
    20,987.34x = 334,622,679.13
  5. Step 5: Solve for x
    x = 334,622,679.13/20,987.34
  6. Step 6: Final answer
    x = 15,944.03

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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.