Home / 31,390.20-47,012.40-21,475.80

Finding the Fourth Proportional to 31,390.20, 47,012.40 and 21,475.80

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Solution

The fourth proportional to 31,390.20, 47,012.40 and 21,475.80 is: 32,163.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,390.20 : 47,012.40 = 21,475.80 : x
  2. Step 2: Convert to fraction form
    31,390.20/47,012.40 = 21,475.80/x
  3. Step 3: Cross multiply
    31,390.20x = 47,012.40 × 21,475.80
  4. Step 4: Simplify right side
    31,390.20x = 1,009,628,899.92
  5. Step 5: Solve for x
    x = 1,009,628,899.92/31,390.20
  6. Step 6: Final answer
    x = 32,163.83

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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.