Home / 20,291.85-28,011.38-12,336.62

Finding the Fourth Proportional to 20,291.85, 28,011.38 and 12,336.62

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Solution

The fourth proportional to 20,291.85, 28,011.38 and 12,336.62 is: 17,029.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.85 : 28,011.38 = 12,336.62 : x
  2. Step 2: Convert to fraction form
    20,291.85/28,011.38 = 12,336.62/x
  3. Step 3: Cross multiply
    20,291.85x = 28,011.38 × 12,336.62
  4. Step 4: Simplify right side
    20,291.85x = 345,565,549.00
  5. Step 5: Solve for x
    x = 345,565,549.00/20,291.85
  6. Step 6: Final answer
    x = 17,029.77

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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.