Home / 31,387.30-43,312.53-28,879.54

Finding the Fourth Proportional to 31,387.30, 43,312.53 and 28,879.54

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Solution

The fourth proportional to 31,387.30, 43,312.53 and 28,879.54 is: 39,851.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,387.30 : 43,312.53 = 28,879.54 : x
  2. Step 2: Convert to fraction form
    31,387.30/43,312.53 = 28,879.54/x
  3. Step 3: Cross multiply
    31,387.30x = 43,312.53 × 28,879.54
  4. Step 4: Simplify right side
    31,387.30x = 1,250,845,942.64
  5. Step 5: Solve for x
    x = 1,250,845,942.64/31,387.30
  6. Step 6: Final answer
    x = 39,851.98

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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.