Home / 20,751.48-31,126.86-12,433.68

Finding the Fourth Proportional to 20,751.48, 31,126.86 and 12,433.68

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Solution

The fourth proportional to 20,751.48, 31,126.86 and 12,433.68 is: 18,650.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.48 : 31,126.86 = 12,433.68 : x
  2. Step 2: Convert to fraction form
    20,751.48/31,126.86 = 12,433.68/x
  3. Step 3: Cross multiply
    20,751.48x = 31,126.86 × 12,433.68
  4. Step 4: Simplify right side
    20,751.48x = 387,021,416.64
  5. Step 5: Solve for x
    x = 387,021,416.64/20,751.48
  6. Step 6: Final answer
    x = 18,650.30

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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.