Home / 28,478.49-42,721.83-8,758.71

Finding the Fourth Proportional to 28,478.49, 42,721.83 and 8,758.71

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Solution

The fourth proportional to 28,478.49, 42,721.83 and 8,758.71 is: 13,139.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.49 : 42,721.83 = 8,758.71 : x
  2. Step 2: Convert to fraction form
    28,478.49/42,721.83 = 8,758.71/x
  3. Step 3: Cross multiply
    28,478.49x = 42,721.83 × 8,758.71
  4. Step 4: Simplify right side
    28,478.49x = 374,188,119.64
  5. Step 5: Solve for x
    x = 374,188,119.64/28,478.49
  6. Step 6: Final answer
    x = 13,139.32

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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.