Home / 20,772.45-28,668.15-12,277.31

Finding the Fourth Proportional to 20,772.45, 28,668.15 and 12,277.31

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Solution

The fourth proportional to 20,772.45, 28,668.15 and 12,277.31 is: 16,943.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.45 : 28,668.15 = 12,277.31 : x
  2. Step 2: Convert to fraction form
    20,772.45/28,668.15 = 12,277.31/x
  3. Step 3: Cross multiply
    20,772.45x = 28,668.15 × 12,277.31
  4. Step 4: Simplify right side
    20,772.45x = 351,967,621.34
  5. Step 5: Solve for x
    x = 351,967,621.34/20,772.45
  6. Step 6: Final answer
    x = 16,943.96

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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.