Home / 13,201.72-18,218.36-7,897.78

Finding the Fourth Proportional to 13,201.72, 18,218.36 and 7,897.78

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Solution

The fourth proportional to 13,201.72, 18,218.36 and 7,897.78 is: 10,898.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,201.72 : 18,218.36 = 7,897.78 : x
  2. Step 2: Convert to fraction form
    13,201.72/18,218.36 = 7,897.78/x
  3. Step 3: Cross multiply
    13,201.72x = 18,218.36 × 7,897.78
  4. Step 4: Simplify right side
    13,201.72x = 143,884,599.24
  5. Step 5: Solve for x
    x = 143,884,599.24/13,201.72
  6. Step 6: Final answer
    x = 10,898.93

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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.