Home / 31,999.20-47,998.80-28,111.20

Finding the Fourth Proportional to 31,999.20, 47,998.80 and 28,111.20

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Solution

The fourth proportional to 31,999.20, 47,998.80 and 28,111.20 is: 42,166.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,999.20 : 47,998.80 = 28,111.20 : x
  2. Step 2: Convert to fraction form
    31,999.20/47,998.80 = 28,111.20/x
  3. Step 3: Cross multiply
    31,999.20x = 47,998.80 × 28,111.20
  4. Step 4: Simplify right side
    31,999.20x = 1,349,303,866.56
  5. Step 5: Solve for x
    x = 1,349,303,866.56/31,999.20
  6. Step 6: Final answer
    x = 42,166.80

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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.