Home / 13,309.88-18,365.10-9,116.60

Finding the Fourth Proportional to 13,309.88, 18,365.10 and 9,116.60

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Solution

The fourth proportional to 13,309.88, 18,365.10 and 9,116.60 is: 12,579.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,309.88 : 18,365.10 = 9,116.60 : x
  2. Step 2: Convert to fraction form
    13,309.88/18,365.10 = 9,116.60/x
  3. Step 3: Cross multiply
    13,309.88x = 18,365.10 × 9,116.60
  4. Step 4: Simplify right side
    13,309.88x = 167,427,270.66
  5. Step 5: Solve for x
    x = 167,427,270.66/13,309.88
  6. Step 6: Final answer
    x = 12,579.17

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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.