Home / 13,209.61-18,222.99-7,903.36

Finding the Fourth Proportional to 13,209.61, 18,222.99 and 7,903.36

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Solution

The fourth proportional to 13,209.61, 18,222.99 and 7,903.36 is: 10,902.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.61 : 18,222.99 = 7,903.36 : x
  2. Step 2: Convert to fraction form
    13,209.61/18,222.99 = 7,903.36/x
  3. Step 3: Cross multiply
    13,209.61x = 18,222.99 × 7,903.36
  4. Step 4: Simplify right side
    13,209.61x = 144,022,850.25
  5. Step 5: Solve for x
    x = 144,022,850.25/13,209.61
  6. Step 6: Final answer
    x = 10,902.88

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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.