Home / 13,239.40-18,270.36-7,650.40

Finding the Fourth Proportional to 13,239.40, 18,270.36 and 7,650.40

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Solution

The fourth proportional to 13,239.40, 18,270.36 and 7,650.40 is: 10,557.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.40 : 18,270.36 = 7,650.40 : x
  2. Step 2: Convert to fraction form
    13,239.40/18,270.36 = 7,650.40/x
  3. Step 3: Cross multiply
    13,239.40x = 18,270.36 × 7,650.40
  4. Step 4: Simplify right side
    13,239.40x = 139,775,562.14
  5. Step 5: Solve for x
    x = 139,775,562.14/13,239.40
  6. Step 6: Final answer
    x = 10,557.55

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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.