Home / 31,423.76-43,372.96-20,809.52

Finding the Fourth Proportional to 31,423.76, 43,372.96 and 20,809.52

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Solution

The fourth proportional to 31,423.76, 43,372.96 and 20,809.52 is: 28,722.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,423.76 : 43,372.96 = 20,809.52 : x
  2. Step 2: Convert to fraction form
    31,423.76/43,372.96 = 20,809.52/x
  3. Step 3: Cross multiply
    31,423.76x = 43,372.96 × 20,809.52
  4. Step 4: Simplify right side
    31,423.76x = 902,570,372.34
  5. Step 5: Solve for x
    x = 902,570,372.34/31,423.76
  6. Step 6: Final answer
    x = 28,722.55

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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.