Home / 13,220.11-18,242.40-7,914.79

Finding the Fourth Proportional to 13,220.11, 18,242.40 and 7,914.79

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Solution

The fourth proportional to 13,220.11, 18,242.40 and 7,914.79 is: 10,921.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.11 : 18,242.40 = 7,914.79 : x
  2. Step 2: Convert to fraction form
    13,220.11/18,242.40 = 7,914.79/x
  3. Step 3: Cross multiply
    13,220.11x = 18,242.40 × 7,914.79
  4. Step 4: Simplify right side
    13,220.11x = 144,384,765.10
  5. Step 5: Solve for x
    x = 144,384,765.10/13,220.11
  6. Step 6: Final answer
    x = 10,921.60

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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.