Home / 20,133.60-30,214.80-8,455.20

Finding the Fourth Proportional to 20,133.60, 30,214.80 and 8,455.20

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Solution

The fourth proportional to 20,133.60, 30,214.80 and 8,455.20 is: 12,688.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,133.60 : 30,214.80 = 8,455.20 : x
  2. Step 2: Convert to fraction form
    20,133.60/30,214.80 = 8,455.20/x
  3. Step 3: Cross multiply
    20,133.60x = 30,214.80 × 8,455.20
  4. Step 4: Simplify right side
    20,133.60x = 255,472,176.96
  5. Step 5: Solve for x
    x = 255,472,176.96/20,133.60
  6. Step 6: Final answer
    x = 12,688.85

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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.