Home / 20,529.60-30,812.40-12,199.20

Finding the Fourth Proportional to 20,529.60, 30,812.40 and 12,199.20

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Solution

The fourth proportional to 20,529.60, 30,812.40 and 12,199.20 is: 18,309.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,529.60 : 30,812.40 = 12,199.20 : x
  2. Step 2: Convert to fraction form
    20,529.60/30,812.40 = 12,199.20/x
  3. Step 3: Cross multiply
    20,529.60x = 30,812.40 × 12,199.20
  4. Step 4: Simplify right side
    20,529.60x = 375,886,630.08
  5. Step 5: Solve for x
    x = 375,886,630.08/20,529.60
  6. Step 6: Final answer
    x = 18,309.50

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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.