Home / 10,921.80-16,354.89-7,218.48

Finding the Fourth Proportional to 10,921.80, 16,354.89 and 7,218.48

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Solution

The fourth proportional to 10,921.80, 16,354.89 and 7,218.48 is: 10,809.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.80 : 16,354.89 = 7,218.48 : x
  2. Step 2: Convert to fraction form
    10,921.80/16,354.89 = 7,218.48/x
  3. Step 3: Cross multiply
    10,921.80x = 16,354.89 × 7,218.48
  4. Step 4: Simplify right side
    10,921.80x = 118,057,446.37
  5. Step 5: Solve for x
    x = 118,057,446.37/10,921.80
  6. Step 6: Final answer
    x = 10,809.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.