Home / 20,623.32-28,460.20-11,191.88

Finding the Fourth Proportional to 20,623.32, 28,460.20 and 11,191.88

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Solution

The fourth proportional to 20,623.32, 28,460.20 and 11,191.88 is: 15,444.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623.32 : 28,460.20 = 11,191.88 : x
  2. Step 2: Convert to fraction form
    20,623.32/28,460.20 = 11,191.88/x
  3. Step 3: Cross multiply
    20,623.32x = 28,460.20 × 11,191.88
  4. Step 4: Simplify right side
    20,623.32x = 318,523,143.18
  5. Step 5: Solve for x
    x = 318,523,143.18/20,623.32
  6. Step 6: Final answer
    x = 15,444.80

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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.