Home / 31,391.45-43,207.53-28,400.93

Finding the Fourth Proportional to 31,391.45, 43,207.53 and 28,400.93

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Solution

The fourth proportional to 31,391.45, 43,207.53 and 28,400.93 is: 39,091.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,391.45 : 43,207.53 = 28,400.93 : x
  2. Step 2: Convert to fraction form
    31,391.45/43,207.53 = 28,400.93/x
  3. Step 3: Cross multiply
    31,391.45x = 43,207.53 × 28,400.93
  4. Step 4: Simplify right side
    31,391.45x = 1,227,134,035.00
  5. Step 5: Solve for x
    x = 1,227,134,035.00/31,391.45
  6. Step 6: Final answer
    x = 39,091.35

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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.