Home / 20,615.75-28,449.74-11,663.06

Finding the Fourth Proportional to 20,615.75, 28,449.74 and 11,663.06

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Solution

The fourth proportional to 20,615.75, 28,449.74 and 11,663.06 is: 16,095.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.75 : 28,449.74 = 11,663.06 : x
  2. Step 2: Convert to fraction form
    20,615.75/28,449.74 = 11,663.06/x
  3. Step 3: Cross multiply
    20,615.75x = 28,449.74 × 11,663.06
  4. Step 4: Simplify right side
    20,615.75x = 331,811,024.60
  5. Step 5: Solve for x
    x = 331,811,024.60/20,615.75
  6. Step 6: Final answer
    x = 16,095.03

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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.