Home / 20,809.76-31,212.32-5,227.42

Finding the Fourth Proportional to 20,809.76, 31,212.32 and 5,227.42

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Solution

The fourth proportional to 20,809.76, 31,212.32 and 5,227.42 is: 7,840.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.76 : 31,212.32 = 5,227.42 : x
  2. Step 2: Convert to fraction form
    20,809.76/31,212.32 = 5,227.42/x
  3. Step 3: Cross multiply
    20,809.76x = 31,212.32 × 5,227.42
  4. Step 4: Simplify right side
    20,809.76x = 163,159,905.81
  5. Step 5: Solve for x
    x = 163,159,905.81/20,809.76
  6. Step 6: Final answer
    x = 7,840.55

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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.