Home / 13,972.88-19,290.79-8,670.62

Finding the Fourth Proportional to 13,972.88, 19,290.79 and 8,670.62

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Solution

The fourth proportional to 13,972.88, 19,290.79 and 8,670.62 is: 11,970.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,972.88 : 19,290.79 = 8,670.62 : x
  2. Step 2: Convert to fraction form
    13,972.88/19,290.79 = 8,670.62/x
  3. Step 3: Cross multiply
    13,972.88x = 19,290.79 × 8,670.62
  4. Step 4: Simplify right side
    13,972.88x = 167,263,168.66
  5. Step 5: Solve for x
    x = 167,263,168.66/13,972.88
  6. Step 6: Final answer
    x = 11,970.56

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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.