Home / 20,419.60-28,178.44-12,458.96

Finding the Fourth Proportional to 20,419.60, 28,178.44 and 12,458.96

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Solution

The fourth proportional to 20,419.60, 28,178.44 and 12,458.96 is: 17,192.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.60 : 28,178.44 = 12,458.96 : x
  2. Step 2: Convert to fraction form
    20,419.60/28,178.44 = 12,458.96/x
  3. Step 3: Cross multiply
    20,419.60x = 28,178.44 × 12,458.96
  4. Step 4: Simplify right side
    20,419.60x = 351,074,056.82
  5. Step 5: Solve for x
    x = 351,074,056.82/20,419.60
  6. Step 6: Final answer
    x = 17,192.99

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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.