Home / 21,138.30-31,707.72-6,346.36

Finding the Fourth Proportional to 21,138.30, 31,707.72 and 6,346.36

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Solution

The fourth proportional to 21,138.30, 31,707.72 and 6,346.36 is: 9,519.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.30 : 31,707.72 = 6,346.36 : x
  2. Step 2: Convert to fraction form
    21,138.30/31,707.72 = 6,346.36/x
  3. Step 3: Cross multiply
    21,138.30x = 31,707.72 × 6,346.36
  4. Step 4: Simplify right side
    21,138.30x = 201,228,605.90
  5. Step 5: Solve for x
    x = 201,228,605.90/21,138.30
  6. Step 6: Final answer
    x = 9,519.62

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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.