Home / 21,440.40-32,165.40-8,291.60

Finding the Fourth Proportional to 21,440.40, 32,165.40 and 8,291.60

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Solution

The fourth proportional to 21,440.40, 32,165.40 and 8,291.60 is: 12,439.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,440.40 : 32,165.40 = 8,291.60 : x
  2. Step 2: Convert to fraction form
    21,440.40/32,165.40 = 8,291.60/x
  3. Step 3: Cross multiply
    21,440.40x = 32,165.40 × 8,291.60
  4. Step 4: Simplify right side
    21,440.40x = 266,702,630.64
  5. Step 5: Solve for x
    x = 266,702,630.64/21,440.40
  6. Step 6: Final answer
    x = 12,439.26

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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.