Home / 21,290.20-31,900.15-12,944.97

Finding the Fourth Proportional to 21,290.20, 31,900.15 and 12,944.97

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Solution

The fourth proportional to 21,290.20, 31,900.15 and 12,944.97 is: 19,396.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.20 : 31,900.15 = 12,944.97 : x
  2. Step 2: Convert to fraction form
    21,290.20/31,900.15 = 12,944.97/x
  3. Step 3: Cross multiply
    21,290.20x = 31,900.15 × 12,944.97
  4. Step 4: Simplify right side
    21,290.20x = 412,946,484.75
  5. Step 5: Solve for x
    x = 412,946,484.75/21,290.20
  6. Step 6: Final answer
    x = 19,396.08

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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.