Home / 20,913.42-28,847.85-12,409.95

Finding the Fourth Proportional to 20,913.42, 28,847.85 and 12,409.95

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Solution

The fourth proportional to 20,913.42, 28,847.85 and 12,409.95 is: 17,118.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.42 : 28,847.85 = 12,409.95 : x
  2. Step 2: Convert to fraction form
    20,913.42/28,847.85 = 12,409.95/x
  3. Step 3: Cross multiply
    20,913.42x = 28,847.85 × 12,409.95
  4. Step 4: Simplify right side
    20,913.42x = 358,000,376.11
  5. Step 5: Solve for x
    x = 358,000,376.11/20,913.42
  6. Step 6: Final answer
    x = 17,118.21

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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.