Home / 13,678.62-18,875.96-7,711.50

Finding the Fourth Proportional to 13,678.62, 18,875.96 and 7,711.50

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Solution

The fourth proportional to 13,678.62, 18,875.96 and 7,711.50 is: 10,641.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.62 : 18,875.96 = 7,711.50 : x
  2. Step 2: Convert to fraction form
    13,678.62/18,875.96 = 7,711.50/x
  3. Step 3: Cross multiply
    13,678.62x = 18,875.96 × 7,711.50
  4. Step 4: Simplify right side
    13,678.62x = 145,561,965.54
  5. Step 5: Solve for x
    x = 145,561,965.54/13,678.62
  6. Step 6: Final answer
    x = 10,641.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.