Home / 13,239.76-18,269.68-7,271.36

Finding the Fourth Proportional to 13,239.76, 18,269.68 and 7,271.36

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Solution

The fourth proportional to 13,239.76, 18,269.68 and 7,271.36 is: 10,033.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.76 : 18,269.68 = 7,271.36 : x
  2. Step 2: Convert to fraction form
    13,239.76/18,269.68 = 7,271.36/x
  3. Step 3: Cross multiply
    13,239.76x = 18,269.68 × 7,271.36
  4. Step 4: Simplify right side
    13,239.76x = 132,845,420.36
  5. Step 5: Solve for x
    x = 132,845,420.36/13,239.76
  6. Step 6: Final answer
    x = 10,033.82

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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.