Home / 42,787.54-64,153.97-20,556.69

Finding the Fourth Proportional to 42,787.54, 64,153.97 and 20,556.69

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Solution

The fourth proportional to 42,787.54, 64,153.97 and 20,556.69 is: 30,821.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,787.54 : 64,153.97 = 20,556.69 : x
  2. Step 2: Convert to fraction form
    42,787.54/64,153.97 = 20,556.69/x
  3. Step 3: Cross multiply
    42,787.54x = 64,153.97 × 20,556.69
  4. Step 4: Simplify right side
    42,787.54x = 1,318,793,273.56
  5. Step 5: Solve for x
    x = 1,318,793,273.56/42,787.54
  6. Step 6: Final answer
    x = 30,821.90

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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.