Home / 21,328.17-31,953.87-12,558.30

Finding the Fourth Proportional to 21,328.17, 31,953.87 and 12,558.30

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Solution

The fourth proportional to 21,328.17, 31,953.87 and 12,558.30 is: 18,814.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.17 : 31,953.87 = 12,558.30 : x
  2. Step 2: Convert to fraction form
    21,328.17/31,953.87 = 12,558.30/x
  3. Step 3: Cross multiply
    21,328.17x = 31,953.87 × 12,558.30
  4. Step 4: Simplify right side
    21,328.17x = 401,286,285.62
  5. Step 5: Solve for x
    x = 401,286,285.62/21,328.17
  6. Step 6: Final answer
    x = 18,814.85

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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.