Home / 20,628.57-28,468.08-11,675.91

Finding the Fourth Proportional to 20,628.57, 28,468.08 and 11,675.91

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Solution

The fourth proportional to 20,628.57, 28,468.08 and 11,675.91 is: 16,113.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.57 : 28,468.08 = 11,675.91 : x
  2. Step 2: Convert to fraction form
    20,628.57/28,468.08 = 11,675.91/x
  3. Step 3: Cross multiply
    20,628.57x = 28,468.08 × 11,675.91
  4. Step 4: Simplify right side
    20,628.57x = 332,390,739.95
  5. Step 5: Solve for x
    x = 332,390,739.95/20,628.57
  6. Step 6: Final answer
    x = 16,113.13

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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.