Home / 18,811.46-28,210.65-7,715

Finding the Fourth Proportional to 18,811.46, 28,210.65 and 7,715

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Solution

The fourth proportional to 18,811.46, 28,210.65 and 7,715 is: 11,569.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.46 : 28,210.65 = 7,715 : x
  2. Step 2: Convert to fraction form
    18,811.46/28,210.65 = 7,715/x
  3. Step 3: Cross multiply
    18,811.46x = 28,210.65 × 7,715
  4. Step 4: Simplify right side
    18,811.46x = 217,645,164.75
  5. Step 5: Solve for x
    x = 217,645,164.75/18,811.46
  6. Step 6: Final answer
    x = 11,569.82

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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.