Home / 31,590.40-47,323.20-20,504.80

Finding the Fourth Proportional to 31,590.40, 47,323.20 and 20,504.80

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Solution

The fourth proportional to 31,590.40, 47,323.20 and 20,504.80 is: 30,716.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,590.40 : 47,323.20 = 20,504.80 : x
  2. Step 2: Convert to fraction form
    31,590.40/47,323.20 = 20,504.80/x
  3. Step 3: Cross multiply
    31,590.40x = 47,323.20 × 20,504.80
  4. Step 4: Simplify right side
    31,590.40x = 970,352,751.36
  5. Step 5: Solve for x
    x = 970,352,751.36/31,590.40
  6. Step 6: Final answer
    x = 30,716.70

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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.