Home / 20,472.40-28,240.68-12,087.28

Finding the Fourth Proportional to 20,472.40, 28,240.68 and 12,087.28

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Solution

The fourth proportional to 20,472.40, 28,240.68 and 12,087.28 is: 16,673.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,472.40 : 28,240.68 = 12,087.28 : x
  2. Step 2: Convert to fraction form
    20,472.40/28,240.68 = 12,087.28/x
  3. Step 3: Cross multiply
    20,472.40x = 28,240.68 × 12,087.28
  4. Step 4: Simplify right side
    20,472.40x = 341,353,006.55
  5. Step 5: Solve for x
    x = 341,353,006.55/20,472.40
  6. Step 6: Final answer
    x = 16,673.81

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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.