Home / 28,478.87-42,721.73-11,850.15

Finding the Fourth Proportional to 28,478.87, 42,721.73 and 11,850.15

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Solution

The fourth proportional to 28,478.87, 42,721.73 and 11,850.15 is: 17,776.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.87 : 42,721.73 = 11,850.15 : x
  2. Step 2: Convert to fraction form
    28,478.87/42,721.73 = 11,850.15/x
  3. Step 3: Cross multiply
    28,478.87x = 42,721.73 × 11,850.15
  4. Step 4: Simplify right side
    28,478.87x = 506,258,849.51
  5. Step 5: Solve for x
    x = 506,258,849.51/28,478.87
  6. Step 6: Final answer
    x = 17,776.65

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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.