Home / 21,269.20-31,903.81-8,775.49

Finding the Fourth Proportional to 21,269.20, 31,903.81 and 8,775.49

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Solution

The fourth proportional to 21,269.20, 31,903.81 and 8,775.49 is: 13,163.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.20 : 31,903.81 = 8,775.49 : x
  2. Step 2: Convert to fraction form
    21,269.20/31,903.81 = 8,775.49/x
  3. Step 3: Cross multiply
    21,269.20x = 31,903.81 × 8,775.49
  4. Step 4: Simplify right side
    21,269.20x = 279,971,645.38
  5. Step 5: Solve for x
    x = 279,971,645.38/21,269.20
  6. Step 6: Final answer
    x = 13,163.24

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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.