Home / 20,894.43-31,369.46-12,135.63

Finding the Fourth Proportional to 20,894.43, 31,369.46 and 12,135.63

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Solution

The fourth proportional to 20,894.43, 31,369.46 and 12,135.63 is: 18,219.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.43 : 31,369.46 = 12,135.63 : x
  2. Step 2: Convert to fraction form
    20,894.43/31,369.46 = 12,135.63/x
  3. Step 3: Cross multiply
    20,894.43x = 31,369.46 × 12,135.63
  4. Step 4: Simplify right side
    20,894.43x = 380,688,159.86
  5. Step 5: Solve for x
    x = 380,688,159.86/20,894.43
  6. Step 6: Final answer
    x = 18,219.60

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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.