Home / 20,946.20-31,421.58-9,091.82

Finding the Fourth Proportional to 20,946.20, 31,421.58 and 9,091.82

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Solution

The fourth proportional to 20,946.20, 31,421.58 and 9,091.82 is: 13,638.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.20 : 31,421.58 = 9,091.82 : x
  2. Step 2: Convert to fraction form
    20,946.20/31,421.58 = 9,091.82/x
  3. Step 3: Cross multiply
    20,946.20x = 31,421.58 × 9,091.82
  4. Step 4: Simplify right side
    20,946.20x = 285,679,349.48
  5. Step 5: Solve for x
    x = 285,679,349.48/20,946.20
  6. Step 6: Final answer
    x = 13,638.72

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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.