Home / 21,187.55-31,775.99-8,711.05

Finding the Fourth Proportional to 21,187.55, 31,775.99 and 8,711.05

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Solution

The fourth proportional to 21,187.55, 31,775.99 and 8,711.05 is: 13,064.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.55 : 31,775.99 = 8,711.05 : x
  2. Step 2: Convert to fraction form
    21,187.55/31,775.99 = 8,711.05/x
  3. Step 3: Cross multiply
    21,187.55x = 31,775.99 × 8,711.05
  4. Step 4: Simplify right side
    21,187.55x = 276,802,237.69
  5. Step 5: Solve for x
    x = 276,802,237.69/21,187.55
  6. Step 6: Final answer
    x = 13,064.38

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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.