Home / 13,140.50-18,133.89-9,786.20

Finding the Fourth Proportional to 13,140.50, 18,133.89 and 9,786.20

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Solution

The fourth proportional to 13,140.50, 18,133.89 and 9,786.20 is: 13,504.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.50 : 18,133.89 = 9,786.20 : x
  2. Step 2: Convert to fraction form
    13,140.50/18,133.89 = 9,786.20/x
  3. Step 3: Cross multiply
    13,140.50x = 18,133.89 × 9,786.20
  4. Step 4: Simplify right side
    13,140.50x = 177,461,874.32
  5. Step 5: Solve for x
    x = 177,461,874.32/13,140.50
  6. Step 6: Final answer
    x = 13,504.96

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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.