Home / 28,143.72-42,209.82-10,603.88

Finding the Fourth Proportional to 28,143.72, 42,209.82 and 10,603.88

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Solution

The fourth proportional to 28,143.72, 42,209.82 and 10,603.88 is: 15,903.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.72 : 42,209.82 = 10,603.88 : x
  2. Step 2: Convert to fraction form
    28,143.72/42,209.82 = 10,603.88/x
  3. Step 3: Cross multiply
    28,143.72x = 42,209.82 × 10,603.88
  4. Step 4: Simplify right side
    28,143.72x = 447,587,866.10
  5. Step 5: Solve for x
    x = 447,587,866.10/28,143.72
  6. Step 6: Final answer
    x = 15,903.65

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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.