Home / 21,236.72-31,855.14-6,445.76

Finding the Fourth Proportional to 21,236.72, 31,855.14 and 6,445.76

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Solution

The fourth proportional to 21,236.72, 31,855.14 and 6,445.76 is: 9,668.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,236.72 : 31,855.14 = 6,445.76 : x
  2. Step 2: Convert to fraction form
    21,236.72/31,855.14 = 6,445.76/x
  3. Step 3: Cross multiply
    21,236.72x = 31,855.14 × 6,445.76
  4. Step 4: Simplify right side
    21,236.72x = 205,330,587.21
  5. Step 5: Solve for x
    x = 205,330,587.21/21,236.72
  6. Step 6: Final answer
    x = 9,668.66

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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.