Home / 20,429.20-30,653.32-12,125.55

Finding the Fourth Proportional to 20,429.20, 30,653.32 and 12,125.55

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Solution

The fourth proportional to 20,429.20, 30,653.32 and 12,125.55 is: 18,193.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.20 : 30,653.32 = 12,125.55 : x
  2. Step 2: Convert to fraction form
    20,429.20/30,653.32 = 12,125.55/x
  3. Step 3: Cross multiply
    20,429.20x = 30,653.32 × 12,125.55
  4. Step 4: Simplify right side
    20,429.20x = 371,688,364.33
  5. Step 5: Solve for x
    x = 371,688,364.33/20,429.20
  6. Step 6: Final answer
    x = 18,193.98

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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.