Home / 28,215.16-42,286.29-13,428.61

Finding the Fourth Proportional to 28,215.16, 42,286.29 and 13,428.61

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Solution

The fourth proportional to 28,215.16, 42,286.29 and 13,428.61 is: 20,125.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.16 : 42,286.29 = 13,428.61 : x
  2. Step 2: Convert to fraction form
    28,215.16/42,286.29 = 13,428.61/x
  3. Step 3: Cross multiply
    28,215.16x = 42,286.29 × 13,428.61
  4. Step 4: Simplify right side
    28,215.16x = 567,846,096.76
  5. Step 5: Solve for x
    x = 567,846,096.76/28,215.16
  6. Step 6: Final answer
    x = 20,125.57

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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.