Home / 12,131.60-18,154.20-8,416.40

Finding the Fourth Proportional to 12,131.60, 18,154.20 and 8,416.40

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Solution

The fourth proportional to 12,131.60, 18,154.20 and 8,416.40 is: 12,594.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,131.60 : 18,154.20 = 8,416.40 : x
  2. Step 2: Convert to fraction form
    12,131.60/18,154.20 = 8,416.40/x
  3. Step 3: Cross multiply
    12,131.60x = 18,154.20 × 8,416.40
  4. Step 4: Simplify right side
    12,131.60x = 152,793,008.88
  5. Step 5: Solve for x
    x = 152,793,008.88/12,131.60
  6. Step 6: Final answer
    x = 12,594.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.