Home / 20,772.45-31,158.72-11,557.89

Finding the Fourth Proportional to 20,772.45, 31,158.72 and 11,557.89

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Solution

The fourth proportional to 20,772.45, 31,158.72 and 11,557.89 is: 17,336.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.45 : 31,158.72 = 11,557.89 : x
  2. Step 2: Convert to fraction form
    20,772.45/31,158.72 = 11,557.89/x
  3. Step 3: Cross multiply
    20,772.45x = 31,158.72 × 11,557.89
  4. Step 4: Simplify right side
    20,772.45x = 360,129,058.30
  5. Step 5: Solve for x
    x = 360,129,058.30/20,772.45
  6. Step 6: Final answer
    x = 17,336.86

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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.