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Finding the Fourth Proportional to 11,703.52, 17,555.28 and 5,128.21

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Solution

The fourth proportional to 11,703.52, 17,555.28 and 5,128.21 is: 7,692.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,703.52 : 17,555.28 = 5,128.21 : x
  2. Step 2: Convert to fraction form
    11,703.52/17,555.28 = 5,128.21/x
  3. Step 3: Cross multiply
    11,703.52x = 17,555.28 × 5,128.21
  4. Step 4: Simplify right side
    11,703.52x = 90,027,162.45
  5. Step 5: Solve for x
    x = 90,027,162.45/11,703.52
  6. Step 6: Final answer
    x = 7,692.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.