Home / 10,921.37-16,381.88-3,130.18

Finding the Fourth Proportional to 10,921.37, 16,381.88 and 3,130.18

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Solution

The fourth proportional to 10,921.37, 16,381.88 and 3,130.18 is: 4,695.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.37 : 16,381.88 = 3,130.18 : x
  2. Step 2: Convert to fraction form
    10,921.37/16,381.88 = 3,130.18/x
  3. Step 3: Cross multiply
    10,921.37x = 16,381.88 × 3,130.18
  4. Step 4: Simplify right side
    10,921.37x = 51,278,188.27
  5. Step 5: Solve for x
    x = 51,278,188.27/10,921.37
  6. Step 6: Final answer
    x = 4,695.22

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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.