Home / 20,741.30-28,622.63-11,309.87

Finding the Fourth Proportional to 20,741.30, 28,622.63 and 11,309.87

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Solution

The fourth proportional to 20,741.30, 28,622.63 and 11,309.87 is: 15,607.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,741.30 : 28,622.63 = 11,309.87 : x
  2. Step 2: Convert to fraction form
    20,741.30/28,622.63 = 11,309.87/x
  3. Step 3: Cross multiply
    20,741.30x = 28,622.63 × 11,309.87
  4. Step 4: Simplify right side
    20,741.30x = 323,718,024.70
  5. Step 5: Solve for x
    x = 323,718,024.70/20,741.30
  6. Step 6: Final answer
    x = 15,607.42

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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.