Home / 13,239.70-18,270.79-7,937.60

Finding the Fourth Proportional to 13,239.70, 18,270.79 and 7,937.60

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Solution

The fourth proportional to 13,239.70, 18,270.79 and 7,937.60 is: 10,953.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.70 : 18,270.79 = 7,937.60 : x
  2. Step 2: Convert to fraction form
    13,239.70/18,270.79 = 7,937.60/x
  3. Step 3: Cross multiply
    13,239.70x = 18,270.79 × 7,937.60
  4. Step 4: Simplify right side
    13,239.70x = 145,026,133.83
  5. Step 5: Solve for x
    x = 145,026,133.83/13,239.70
  6. Step 6: Final answer
    x = 10,953.88

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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.