Home / 28,231.68-42,315.84-13,428.48

Finding the Fourth Proportional to 28,231.68, 42,315.84 and 13,428.48

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Solution

The fourth proportional to 28,231.68, 42,315.84 and 13,428.48 is: 20,127.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,231.68 : 42,315.84 = 13,428.48 : x
  2. Step 2: Convert to fraction form
    28,231.68/42,315.84 = 13,428.48/x
  3. Step 3: Cross multiply
    28,231.68x = 42,315.84 × 13,428.48
  4. Step 4: Simplify right side
    28,231.68x = 568,237,411.12
  5. Step 5: Solve for x
    x = 568,237,411.12/28,231.68
  6. Step 6: Final answer
    x = 20,127.65

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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.