Home / 20,630.61-28,470.83-12,133.31

Finding the Fourth Proportional to 20,630.61, 28,470.83 and 12,133.31

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Solution

The fourth proportional to 20,630.61, 28,470.83 and 12,133.31 is: 16,744.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.61 : 28,470.83 = 12,133.31 : x
  2. Step 2: Convert to fraction form
    20,630.61/28,470.83 = 12,133.31/x
  3. Step 3: Cross multiply
    20,630.61x = 28,470.83 × 12,133.31
  4. Step 4: Simplify right side
    20,630.61x = 345,445,203.33
  5. Step 5: Solve for x
    x = 345,445,203.33/20,630.61
  6. Step 6: Final answer
    x = 16,744.30

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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.