Home / 31,728.54-43,765.51-20,412.76

Finding the Fourth Proportional to 31,728.54, 43,765.51 and 20,412.76

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Solution

The fourth proportional to 31,728.54, 43,765.51 and 20,412.76 is: 28,156.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,728.54 : 43,765.51 = 20,412.76 : x
  2. Step 2: Convert to fraction form
    31,728.54/43,765.51 = 20,412.76/x
  3. Step 3: Cross multiply
    31,728.54x = 43,765.51 × 20,412.76
  4. Step 4: Simplify right side
    31,728.54x = 893,374,851.91
  5. Step 5: Solve for x
    x = 893,374,851.91/31,728.54
  6. Step 6: Final answer
    x = 28,156.82

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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.