Home / 20,958.05-31,436.62-9,858.59

Finding the Fourth Proportional to 20,958.05, 31,436.62 and 9,858.59

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Solution

The fourth proportional to 20,958.05, 31,436.62 and 9,858.59 is: 14,787.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,958.05 : 31,436.62 = 9,858.59 : x
  2. Step 2: Convert to fraction form
    20,958.05/31,436.62 = 9,858.59/x
  3. Step 3: Cross multiply
    20,958.05x = 31,436.62 × 9,858.59
  4. Step 4: Simplify right side
    20,958.05x = 309,920,541.09
  5. Step 5: Solve for x
    x = 309,920,541.09/20,958.05
  6. Step 6: Final answer
    x = 14,787.66

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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.