Home / 18,630.72-25,721.88-12,819.83

Finding the Fourth Proportional to 18,630.72, 25,721.88 and 12,819.83

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Solution

The fourth proportional to 18,630.72, 25,721.88 and 12,819.83 is: 17,699.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,630.72 : 25,721.88 = 12,819.83 : x
  2. Step 2: Convert to fraction form
    18,630.72/25,721.88 = 12,819.83/x
  3. Step 3: Cross multiply
    18,630.72x = 25,721.88 × 12,819.83
  4. Step 4: Simplify right side
    18,630.72x = 329,750,000.27
  5. Step 5: Solve for x
    x = 329,750,000.27/18,630.72
  6. Step 6: Final answer
    x = 17,699.26

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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.