Home / 10,921.09-15,069.58-6,140.37

Finding the Fourth Proportional to 10,921.09, 15,069.58 and 6,140.37

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Solution

The fourth proportional to 10,921.09, 15,069.58 and 6,140.37 is: 8,472.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.09 : 15,069.58 = 6,140.37 : x
  2. Step 2: Convert to fraction form
    10,921.09/15,069.58 = 6,140.37/x
  3. Step 3: Cross multiply
    10,921.09x = 15,069.58 × 6,140.37
  4. Step 4: Simplify right side
    10,921.09x = 92,532,796.94
  5. Step 5: Solve for x
    x = 92,532,796.94/10,921.09
  6. Step 6: Final answer
    x = 8,472.85

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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.