Home / 21,247.21-31,870.88-5,664.84

Finding the Fourth Proportional to 21,247.21, 31,870.88 and 5,664.84

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Solution

The fourth proportional to 21,247.21, 31,870.88 and 5,664.84 is: 8,497.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.21 : 31,870.88 = 5,664.84 : x
  2. Step 2: Convert to fraction form
    21,247.21/31,870.88 = 5,664.84/x
  3. Step 3: Cross multiply
    21,247.21x = 31,870.88 × 5,664.84
  4. Step 4: Simplify right side
    21,247.21x = 180,543,435.86
  5. Step 5: Solve for x
    x = 180,543,435.86/21,247.21
  6. Step 6: Final answer
    x = 8,497.28

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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.