Home / 20,913.43-28,847.84-12,409.95

Finding the Fourth Proportional to 20,913.43, 28,847.84 and 12,409.95

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Solution

The fourth proportional to 20,913.43, 28,847.84 and 12,409.95 is: 17,118.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.43 : 28,847.84 = 12,409.95 : x
  2. Step 2: Convert to fraction form
    20,913.43/28,847.84 = 12,409.95/x
  3. Step 3: Cross multiply
    20,913.43x = 28,847.84 × 12,409.95
  4. Step 4: Simplify right side
    20,913.43x = 358,000,252.01
  5. Step 5: Solve for x
    x = 358,000,252.01/20,913.43
  6. Step 6: Final answer
    x = 17,118.20

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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.