Home / 20,753.72-28,640.10-11,322.30

Finding the Fourth Proportional to 20,753.72, 28,640.10 and 11,322.30

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Solution

The fourth proportional to 20,753.72, 28,640.10 and 11,322.30 is: 15,624.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.72 : 28,640.10 = 11,322.30 : x
  2. Step 2: Convert to fraction form
    20,753.72/28,640.10 = 11,322.30/x
  3. Step 3: Cross multiply
    20,753.72x = 28,640.10 × 11,322.30
  4. Step 4: Simplify right side
    20,753.72x = 324,271,804.23
  5. Step 5: Solve for x
    x = 324,271,804.23/20,753.72
  6. Step 6: Final answer
    x = 15,624.76

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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.