Home / 28,173.82-42,282.15-10,421.28

Finding the Fourth Proportional to 28,173.82, 42,282.15 and 10,421.28

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Solution

The fourth proportional to 28,173.82, 42,282.15 and 10,421.28 is: 15,639.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,173.82 : 42,282.15 = 10,421.28 : x
  2. Step 2: Convert to fraction form
    28,173.82/42,282.15 = 10,421.28/x
  3. Step 3: Cross multiply
    28,173.82x = 42,282.15 × 10,421.28
  4. Step 4: Simplify right side
    28,173.82x = 440,633,860.63
  5. Step 5: Solve for x
    x = 440,633,860.63/28,173.82
  6. Step 6: Final answer
    x = 15,639.83

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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.