Home / 21,297.47-31,942.08-8,146.76

Finding the Fourth Proportional to 21,297.47, 31,942.08 and 8,146.76

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Solution

The fourth proportional to 21,297.47, 31,942.08 and 8,146.76 is: 12,218.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,297.47 : 31,942.08 = 8,146.76 : x
  2. Step 2: Convert to fraction form
    21,297.47/31,942.08 = 8,146.76/x
  3. Step 3: Cross multiply
    21,297.47x = 31,942.08 × 8,146.76
  4. Step 4: Simplify right side
    21,297.47x = 260,224,299.95
  5. Step 5: Solve for x
    x = 260,224,299.95/21,297.47
  6. Step 6: Final answer
    x = 12,218.56

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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.