Home / 20,455.27-28,228.73-12,501.88

Finding the Fourth Proportional to 20,455.27, 28,228.73 and 12,501.88

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Solution

The fourth proportional to 20,455.27, 28,228.73 and 12,501.88 is: 17,252.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.27 : 28,228.73 = 12,501.88 : x
  2. Step 2: Convert to fraction form
    20,455.27/28,228.73 = 12,501.88/x
  3. Step 3: Cross multiply
    20,455.27x = 28,228.73 × 12,501.88
  4. Step 4: Simplify right side
    20,455.27x = 352,912,061.93
  5. Step 5: Solve for x
    x = 352,912,061.93/20,455.27
  6. Step 6: Final answer
    x = 17,252.87

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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.