Home / 21,003.78-28,984.96-12,051.48

Finding the Fourth Proportional to 21,003.78, 28,984.96 and 12,051.48

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Solution

The fourth proportional to 21,003.78, 28,984.96 and 12,051.48 is: 16,630.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.78 : 28,984.96 = 12,051.48 : x
  2. Step 2: Convert to fraction form
    21,003.78/28,984.96 = 12,051.48/x
  3. Step 3: Cross multiply
    21,003.78x = 28,984.96 × 12,051.48
  4. Step 4: Simplify right side
    21,003.78x = 349,311,665.74
  5. Step 5: Solve for x
    x = 349,311,665.74/21,003.78
  6. Step 6: Final answer
    x = 16,630.90

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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.