Home / 20,730.98-28,609.42-11,777.95

Finding the Fourth Proportional to 20,730.98, 28,609.42 and 11,777.95

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Solution

The fourth proportional to 20,730.98, 28,609.42 and 11,777.95 is: 16,253.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.98 : 28,609.42 = 11,777.95 : x
  2. Step 2: Convert to fraction form
    20,730.98/28,609.42 = 11,777.95/x
  3. Step 3: Cross multiply
    20,730.98x = 28,609.42 × 11,777.95
  4. Step 4: Simplify right side
    20,730.98x = 336,960,175.24
  5. Step 5: Solve for x
    x = 336,960,175.24/20,730.98
  6. Step 6: Final answer
    x = 16,253.95

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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.