Home / 31,443.45-43,409.91-20,847.43

Finding the Fourth Proportional to 31,443.45, 43,409.91 and 20,847.43

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Solution

The fourth proportional to 31,443.45, 43,409.91 and 20,847.43 is: 28,781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,443.45 : 43,409.91 = 20,847.43 : x
  2. Step 2: Convert to fraction form
    31,443.45/43,409.91 = 20,847.43/x
  3. Step 3: Cross multiply
    31,443.45x = 43,409.91 × 20,847.43
  4. Step 4: Simplify right side
    31,443.45x = 904,985,060.03
  5. Step 5: Solve for x
    x = 904,985,060.03/31,443.45
  6. Step 6: Final answer
    x = 28,781.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.