Home / 20,392.06-28,143.04-12,438.94

Finding the Fourth Proportional to 20,392.06, 28,143.04 and 12,438.94

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Solution

The fourth proportional to 20,392.06, 28,143.04 and 12,438.94 is: 17,166.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.06 : 28,143.04 = 12,438.94 : x
  2. Step 2: Convert to fraction form
    20,392.06/28,143.04 = 12,438.94/x
  3. Step 3: Cross multiply
    20,392.06x = 28,143.04 × 12,438.94
  4. Step 4: Simplify right side
    20,392.06x = 350,069,585.98
  5. Step 5: Solve for x
    x = 350,069,585.98/20,392.06
  6. Step 6: Final answer
    x = 17,166.96

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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.