Home / 13,208.61-18,221.61-7,902.36

Finding the Fourth Proportional to 13,208.61, 18,221.61 and 7,902.36

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Solution

The fourth proportional to 13,208.61, 18,221.61 and 7,902.36 is: 10,901.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,208.61 : 18,221.61 = 7,902.36 : x
  2. Step 2: Convert to fraction form
    13,208.61/18,221.61 = 7,902.36/x
  3. Step 3: Cross multiply
    13,208.61x = 18,221.61 × 7,902.36
  4. Step 4: Simplify right side
    13,208.61x = 143,993,722.00
  5. Step 5: Solve for x
    x = 143,993,722.00/13,208.61
  6. Step 6: Final answer
    x = 10,901.50

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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.