Home / 21,065.68-31,606.20-7,216.08

Finding the Fourth Proportional to 21,065.68, 31,606.20 and 7,216.08

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Solution

The fourth proportional to 21,065.68, 31,606.20 and 7,216.08 is: 10,826.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,065.68 : 31,606.20 = 7,216.08 : x
  2. Step 2: Convert to fraction form
    21,065.68/31,606.20 = 7,216.08/x
  3. Step 3: Cross multiply
    21,065.68x = 31,606.20 × 7,216.08
  4. Step 4: Simplify right side
    21,065.68x = 228,072,867.70
  5. Step 5: Solve for x
    x = 228,072,867.70/21,065.68
  6. Step 6: Final answer
    x = 10,826.75

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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.