Home / 13,154.28-18,155.26-7,776.50

Finding the Fourth Proportional to 13,154.28, 18,155.26 and 7,776.50

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Solution

The fourth proportional to 13,154.28, 18,155.26 and 7,776.50 is: 10,732.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,154.28 : 18,155.26 = 7,776.50 : x
  2. Step 2: Convert to fraction form
    13,154.28/18,155.26 = 7,776.50/x
  3. Step 3: Cross multiply
    13,154.28x = 18,155.26 × 7,776.50
  4. Step 4: Simplify right side
    13,154.28x = 141,184,379.39
  5. Step 5: Solve for x
    x = 141,184,379.39/13,154.28
  6. Step 6: Final answer
    x = 10,732.96

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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.