Home / 21,286.60-31,929.90-5,491.60

Finding the Fourth Proportional to 21,286.60, 31,929.90 and 5,491.60

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Solution

The fourth proportional to 21,286.60, 31,929.90 and 5,491.60 is: 8,237.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.60 : 31,929.90 = 5,491.60 : x
  2. Step 2: Convert to fraction form
    21,286.60/31,929.90 = 5,491.60/x
  3. Step 3: Cross multiply
    21,286.60x = 31,929.90 × 5,491.60
  4. Step 4: Simplify right side
    21,286.60x = 175,346,238.84
  5. Step 5: Solve for x
    x = 175,346,238.84/21,286.60
  6. Step 6: Final answer
    x = 8,237.40

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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.