Home / 13,202.71-18,219.20-7,900.45

Finding the Fourth Proportional to 13,202.71, 18,219.20 and 7,900.45

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Solution

The fourth proportional to 13,202.71, 18,219.20 and 7,900.45 is: 10,902.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,202.71 : 18,219.20 = 7,900.45 : x
  2. Step 2: Convert to fraction form
    13,202.71/18,219.20 = 7,900.45/x
  3. Step 3: Cross multiply
    13,202.71x = 18,219.20 × 7,900.45
  4. Step 4: Simplify right side
    13,202.71x = 143,939,878.64
  5. Step 5: Solve for x
    x = 143,939,878.64/13,202.71
  6. Step 6: Final answer
    x = 10,902.30

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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.