Home / 14,991.30-20,680.65-9,690.66

Finding the Fourth Proportional to 14,991.30, 20,680.65 and 9,690.66

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Solution

The fourth proportional to 14,991.30, 20,680.65 and 9,690.66 is: 13,368.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991.30 : 20,680.65 = 9,690.66 : x
  2. Step 2: Convert to fraction form
    14,991.30/20,680.65 = 9,690.66/x
  3. Step 3: Cross multiply
    14,991.30x = 20,680.65 × 9,690.66
  4. Step 4: Simplify right side
    14,991.30x = 200,409,147.73
  5. Step 5: Solve for x
    x = 200,409,147.73/14,991.30
  6. Step 6: Final answer
    x = 13,368.36

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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.