Home / 20,922.08-28,876.56-12,967.84

Finding the Fourth Proportional to 20,922.08, 28,876.56 and 12,967.84

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Solution

The fourth proportional to 20,922.08, 28,876.56 and 12,967.84 is: 17,898.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.08 : 28,876.56 = 12,967.84 : x
  2. Step 2: Convert to fraction form
    20,922.08/28,876.56 = 12,967.84/x
  3. Step 3: Cross multiply
    20,922.08x = 28,876.56 × 12,967.84
  4. Step 4: Simplify right side
    20,922.08x = 374,466,609.83
  5. Step 5: Solve for x
    x = 374,466,609.83/20,922.08
  6. Step 6: Final answer
    x = 17,898.15

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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.