Home / 21,171.08-31,745.46-11,307.68

Finding the Fourth Proportional to 21,171.08, 31,745.46 and 11,307.68

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Solution

The fourth proportional to 21,171.08, 31,745.46 and 11,307.68 is: 16,955.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.08 : 31,745.46 = 11,307.68 : x
  2. Step 2: Convert to fraction form
    21,171.08/31,745.46 = 11,307.68/x
  3. Step 3: Cross multiply
    21,171.08x = 31,745.46 × 11,307.68
  4. Step 4: Simplify right side
    21,171.08x = 358,967,503.13
  5. Step 5: Solve for x
    x = 358,967,503.13/21,171.08
  6. Step 6: Final answer
    x = 16,955.56

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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.