Home / 20,670.72-28,525.68-12,287.28

Finding the Fourth Proportional to 20,670.72, 28,525.68 and 12,287.28

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Solution

The fourth proportional to 20,670.72, 28,525.68 and 12,287.28 is: 16,956.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.72 : 28,525.68 = 12,287.28 : x
  2. Step 2: Convert to fraction form
    20,670.72/28,525.68 = 12,287.28/x
  3. Step 3: Cross multiply
    20,670.72x = 28,525.68 × 12,287.28
  4. Step 4: Simplify right side
    20,670.72x = 350,503,017.35
  5. Step 5: Solve for x
    x = 350,503,017.35/20,670.72
  6. Step 6: Final answer
    x = 16,956.50

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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.