Home / 19,819.03-29,708.40-12,428.64

Finding the Fourth Proportional to 19,819.03, 29,708.40 and 12,428.64

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Solution

The fourth proportional to 19,819.03, 29,708.40 and 12,428.64 is: 18,630.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,819.03 : 29,708.40 = 12,428.64 : x
  2. Step 2: Convert to fraction form
    19,819.03/29,708.40 = 12,428.64/x
  3. Step 3: Cross multiply
    19,819.03x = 29,708.40 × 12,428.64
  4. Step 4: Simplify right side
    19,819.03x = 369,235,008.58
  5. Step 5: Solve for x
    x = 369,235,008.58/19,819.03
  6. Step 6: Final answer
    x = 18,630.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.