Home / 20,731.65-28,608.59-11,777.91

Finding the Fourth Proportional to 20,731.65, 28,608.59 and 11,777.91

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Solution

The fourth proportional to 20,731.65, 28,608.59 and 11,777.91 is: 16,252.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.65 : 28,608.59 = 11,777.91 : x
  2. Step 2: Convert to fraction form
    20,731.65/28,608.59 = 11,777.91/x
  3. Step 3: Cross multiply
    20,731.65x = 28,608.59 × 11,777.91
  4. Step 4: Simplify right side
    20,731.65x = 336,949,320.41
  5. Step 5: Solve for x
    x = 336,949,320.41/20,731.65
  6. Step 6: Final answer
    x = 16,252.90

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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.