Home / 10,921.10-15,069.84-6,140.07

Finding the Fourth Proportional to 10,921.10, 15,069.84 and 6,140.07

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Solution

The fourth proportional to 10,921.10, 15,069.84 and 6,140.07 is: 8,472.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.10 : 15,069.84 = 6,140.07 : x
  2. Step 2: Convert to fraction form
    10,921.10/15,069.84 = 6,140.07/x
  3. Step 3: Cross multiply
    10,921.10x = 15,069.84 × 6,140.07
  4. Step 4: Simplify right side
    10,921.10x = 92,529,872.49
  5. Step 5: Solve for x
    x = 92,529,872.49/10,921.10
  6. Step 6: Final answer
    x = 8,472.58

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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.