Home / 21,332.88-29,439.72-11,901.60

Finding the Fourth Proportional to 21,332.88, 29,439.72 and 11,901.60

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Solution

The fourth proportional to 21,332.88, 29,439.72 and 11,901.60 is: 16,424.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,332.88 : 29,439.72 = 11,901.60 : x
  2. Step 2: Convert to fraction form
    21,332.88/29,439.72 = 11,901.60/x
  3. Step 3: Cross multiply
    21,332.88x = 29,439.72 × 11,901.60
  4. Step 4: Simplify right side
    21,332.88x = 350,379,771.55
  5. Step 5: Solve for x
    x = 350,379,771.55/21,332.88
  6. Step 6: Final answer
    x = 16,424.40

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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.