Home / 13,188.69-18,200.40-7,220.36

Finding the Fourth Proportional to 13,188.69, 18,200.40 and 7,220.36

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Solution

The fourth proportional to 13,188.69, 18,200.40 and 7,220.36 is: 9,964.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.69 : 18,200.40 = 7,220.36 : x
  2. Step 2: Convert to fraction form
    13,188.69/18,200.40 = 7,220.36/x
  3. Step 3: Cross multiply
    13,188.69x = 18,200.40 × 7,220.36
  4. Step 4: Simplify right side
    13,188.69x = 131,413,337.00
  5. Step 5: Solve for x
    x = 131,413,337.00/13,188.69
  6. Step 6: Final answer
    x = 9,964.09

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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.