Home / 21,085.90-29,098.66-11,525.80

Finding the Fourth Proportional to 21,085.90, 29,098.66 and 11,525.80

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Solution

The fourth proportional to 21,085.90, 29,098.66 and 11,525.80 is: 15,905.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.90 : 29,098.66 = 11,525.80 : x
  2. Step 2: Convert to fraction form
    21,085.90/29,098.66 = 11,525.80/x
  3. Step 3: Cross multiply
    21,085.90x = 29,098.66 × 11,525.80
  4. Step 4: Simplify right side
    21,085.90x = 335,385,277.80
  5. Step 5: Solve for x
    x = 335,385,277.80/21,085.90
  6. Step 6: Final answer
    x = 15,905.67

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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.