Home / 12,861.20-19,320.60-12,336.40

Finding the Fourth Proportional to 12,861.20, 19,320.60 and 12,336.40

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Solution

The fourth proportional to 12,861.20, 19,320.60 and 12,336.40 is: 18,532.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,861.20 : 19,320.60 = 12,336.40 : x
  2. Step 2: Convert to fraction form
    12,861.20/19,320.60 = 12,336.40/x
  3. Step 3: Cross multiply
    12,861.20x = 19,320.60 × 12,336.40
  4. Step 4: Simplify right side
    12,861.20x = 238,346,649.84
  5. Step 5: Solve for x
    x = 238,346,649.84/12,861.20
  6. Step 6: Final answer
    x = 18,532.22

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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.