Home / 20,527.71-28,309.35-12,960.96

Finding the Fourth Proportional to 20,527.71, 28,309.35 and 12,960.96

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Solution

The fourth proportional to 20,527.71, 28,309.35 and 12,960.96 is: 17,874.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,527.71 : 28,309.35 = 12,960.96 : x
  2. Step 2: Convert to fraction form
    20,527.71/28,309.35 = 12,960.96/x
  3. Step 3: Cross multiply
    20,527.71x = 28,309.35 × 12,960.96
  4. Step 4: Simplify right side
    20,527.71x = 366,916,352.98
  5. Step 5: Solve for x
    x = 366,916,352.98/20,527.71
  6. Step 6: Final answer
    x = 17,874.20

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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.