Home / 20,431.14-28,184.96-12,459.52

Finding the Fourth Proportional to 20,431.14, 28,184.96 and 12,459.52

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Solution

The fourth proportional to 20,431.14, 28,184.96 and 12,459.52 is: 17,188.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.14 : 28,184.96 = 12,459.52 : x
  2. Step 2: Convert to fraction form
    20,431.14/28,184.96 = 12,459.52/x
  3. Step 3: Cross multiply
    20,431.14x = 28,184.96 × 12,459.52
  4. Step 4: Simplify right side
    20,431.14x = 351,171,139.20
  5. Step 5: Solve for x
    x = 351,171,139.20/20,431.14
  6. Step 6: Final answer
    x = 17,188.04

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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.