Home / 15,383.76-21,229.20-8,669.28

Finding the Fourth Proportional to 15,383.76, 21,229.20 and 8,669.28

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Solution

The fourth proportional to 15,383.76, 21,229.20 and 8,669.28 is: 11,963.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,383.76 : 21,229.20 = 8,669.28 : x
  2. Step 2: Convert to fraction form
    15,383.76/21,229.20 = 8,669.28/x
  3. Step 3: Cross multiply
    15,383.76x = 21,229.20 × 8,669.28
  4. Step 4: Simplify right side
    15,383.76x = 184,041,878.98
  5. Step 5: Solve for x
    x = 184,041,878.98/15,383.76
  6. Step 6: Final answer
    x = 11,963.39

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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.