Home / 12,039.20-16,630.62-10,921.40

Finding the Fourth Proportional to 12,039.20, 16,630.62 and 10,921.40

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Solution

The fourth proportional to 12,039.20, 16,630.62 and 10,921.40 is: 15,086.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,039.20 : 16,630.62 = 10,921.40 : x
  2. Step 2: Convert to fraction form
    12,039.20/16,630.62 = 10,921.40/x
  3. Step 3: Cross multiply
    12,039.20x = 16,630.62 × 10,921.40
  4. Step 4: Simplify right side
    12,039.20x = 181,629,653.27
  5. Step 5: Solve for x
    x = 181,629,653.27/12,039.20
  6. Step 6: Final answer
    x = 15,086.52

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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.