Home / 21,707.21-29,956.06-12,147.11

Finding the Fourth Proportional to 21,707.21, 29,956.06 and 12,147.11

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Solution

The fourth proportional to 21,707.21, 29,956.06 and 12,147.11 is: 16,763.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,707.21 : 29,956.06 = 12,147.11 : x
  2. Step 2: Convert to fraction form
    21,707.21/29,956.06 = 12,147.11/x
  3. Step 3: Cross multiply
    21,707.21x = 29,956.06 × 12,147.11
  4. Step 4: Simplify right side
    21,707.21x = 363,879,555.99
  5. Step 5: Solve for x
    x = 363,879,555.99/21,707.21
  6. Step 6: Final answer
    x = 16,763.07

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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.