Home / 28,511.28-39,347.64-15,935.22

Finding the Fourth Proportional to 28,511.28, 39,347.64 and 15,935.22

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Solution

The fourth proportional to 28,511.28, 39,347.64 and 15,935.22 is: 21,991.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,511.28 : 39,347.64 = 15,935.22 : x
  2. Step 2: Convert to fraction form
    28,511.28/39,347.64 = 15,935.22/x
  3. Step 3: Cross multiply
    28,511.28x = 39,347.64 × 15,935.22
  4. Step 4: Simplify right side
    28,511.28x = 627,013,299.88
  5. Step 5: Solve for x
    x = 627,013,299.88/28,511.28
  6. Step 6: Final answer
    x = 21,991.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.