Home / 13,756.34-18,961.62-9,278.66

Finding the Fourth Proportional to 13,756.34, 18,961.62 and 9,278.66

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Solution

The fourth proportional to 13,756.34, 18,961.62 and 9,278.66 is: 12,789.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,756.34 : 18,961.62 = 9,278.66 : x
  2. Step 2: Convert to fraction form
    13,756.34/18,961.62 = 9,278.66/x
  3. Step 3: Cross multiply
    13,756.34x = 18,961.62 × 9,278.66
  4. Step 4: Simplify right side
    13,756.34x = 175,938,425.03
  5. Step 5: Solve for x
    x = 175,938,425.03/13,756.34
  6. Step 6: Final answer
    x = 12,789.62

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1.5x scale

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.