Home / 21,011.00-31,489.22-8,516.40

Finding the Fourth Proportional to 21,011.00, 31,489.22 and 8,516.40

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Solution

The fourth proportional to 21,011.00, 31,489.22 and 8,516.40 is: 12,763.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.00 : 31,489.22 = 8,516.40 : x
  2. Step 2: Convert to fraction form
    21,011.00/31,489.22 = 8,516.40/x
  3. Step 3: Cross multiply
    21,011.00x = 31,489.22 × 8,516.40
  4. Step 4: Simplify right side
    21,011.00x = 268,174,750.63
  5. Step 5: Solve for x
    x = 268,174,750.63/21,011.00
  6. Step 6: Final answer
    x = 12,763.54

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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.