Home / 28,438.29-42,639.20-11,809.80

Finding the Fourth Proportional to 28,438.29, 42,639.20 and 11,809.80

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Solution

The fourth proportional to 28,438.29, 42,639.20 and 11,809.80 is: 17,707.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.29 : 42,639.20 = 11,809.80 : x
  2. Step 2: Convert to fraction form
    28,438.29/42,639.20 = 11,809.80/x
  3. Step 3: Cross multiply
    28,438.29x = 42,639.20 × 11,809.80
  4. Step 4: Simplify right side
    28,438.29x = 503,560,210.96
  5. Step 5: Solve for x
    x = 503,560,210.96/28,438.29
  6. Step 6: Final answer
    x = 17,707.12

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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.