Home / 13,731.78-18,945.39-7,762.86

Finding the Fourth Proportional to 13,731.78, 18,945.39 and 7,762.86

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Solution

The fourth proportional to 13,731.78, 18,945.39 and 7,762.86 is: 10,710.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.78 : 18,945.39 = 7,762.86 : x
  2. Step 2: Convert to fraction form
    13,731.78/18,945.39 = 7,762.86/x
  3. Step 3: Cross multiply
    13,731.78x = 18,945.39 × 7,762.86
  4. Step 4: Simplify right side
    13,731.78x = 147,070,410.22
  5. Step 5: Solve for x
    x = 147,070,410.22/13,731.78
  6. Step 6: Final answer
    x = 10,710.22

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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.