Home / 31,456.80-43,401.60-19,520.64

Finding the Fourth Proportional to 31,456.80, 43,401.60 and 19,520.64

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Solution

The fourth proportional to 31,456.80, 43,401.60 and 19,520.64 is: 26,933.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,456.80 : 43,401.60 = 19,520.64 : x
  2. Step 2: Convert to fraction form
    31,456.80/43,401.60 = 19,520.64/x
  3. Step 3: Cross multiply
    31,456.80x = 43,401.60 × 19,520.64
  4. Step 4: Simplify right side
    31,456.80x = 847,227,009.02
  5. Step 5: Solve for x
    x = 847,227,009.02/31,456.80
  6. Step 6: Final answer
    x = 26,933.03

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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.