Home / 21,342.55-29,455.69-11,911.72

Finding the Fourth Proportional to 21,342.55, 29,455.69 and 11,911.72

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Solution

The fourth proportional to 21,342.55, 29,455.69 and 11,911.72 is: 16,439.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.55 : 29,455.69 = 11,911.72 : x
  2. Step 2: Convert to fraction form
    21,342.55/29,455.69 = 11,911.72/x
  3. Step 3: Cross multiply
    21,342.55x = 29,455.69 × 11,911.72
  4. Step 4: Simplify right side
    21,342.55x = 350,867,931.69
  5. Step 5: Solve for x
    x = 350,867,931.69/21,342.55
  6. Step 6: Final answer
    x = 16,439.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.