Home / 13,630.80-18,810.96-7,964.66

Finding the Fourth Proportional to 13,630.80, 18,810.96 and 7,964.66

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Solution

The fourth proportional to 13,630.80, 18,810.96 and 7,964.66 is: 10,991.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.80 : 18,810.96 = 7,964.66 : x
  2. Step 2: Convert to fraction form
    13,630.80/18,810.96 = 7,964.66/x
  3. Step 3: Cross multiply
    13,630.80x = 18,810.96 × 7,964.66
  4. Step 4: Simplify right side
    13,630.80x = 149,822,900.67
  5. Step 5: Solve for x
    x = 149,822,900.67/13,630.80
  6. Step 6: Final answer
    x = 10,991.50

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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.