Home / 31,222.76-43,074.33-20,470.21

Finding the Fourth Proportional to 31,222.76, 43,074.33 and 20,470.21

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Solution

The fourth proportional to 31,222.76, 43,074.33 and 20,470.21 is: 28,240.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,222.76 : 43,074.33 = 20,470.21 : x
  2. Step 2: Convert to fraction form
    31,222.76/43,074.33 = 20,470.21/x
  3. Step 3: Cross multiply
    31,222.76x = 43,074.33 × 20,470.21
  4. Step 4: Simplify right side
    31,222.76x = 881,740,580.71
  5. Step 5: Solve for x
    x = 881,740,580.71/31,222.76
  6. Step 6: Final answer
    x = 28,240.32

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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.