Home / 20,675.45-28,530.43-11,724.45

Finding the Fourth Proportional to 20,675.45, 28,530.43 and 11,724.45

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Solution

The fourth proportional to 20,675.45, 28,530.43 and 11,724.45 is: 16,178.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.45 : 28,530.43 = 11,724.45 : x
  2. Step 2: Convert to fraction form
    20,675.45/28,530.43 = 11,724.45/x
  3. Step 3: Cross multiply
    20,675.45x = 28,530.43 × 11,724.45
  4. Step 4: Simplify right side
    20,675.45x = 334,503,463.71
  5. Step 5: Solve for x
    x = 334,503,463.71/20,675.45
  6. Step 6: Final answer
    x = 16,178.77

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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.